Genkernel

不要混淆 gentoolkit.

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This article has some todo items:

• Article must be updated for genkernel-4 in general

• Add documentation for --boot-font feature

• Add documentation for --bcache feature

• Add documentation for gk.keep feature (including /etc/initramfs.mounts)

genkernel 是Gentoo 创建的一个用来自动化构建 kernel 和 initramfs 的软件。 一些通用特征包括：

• 配置内核源码
• 构建压缩内核bzImage，并把他复制到/boot。
• 创建 initramfs 并将其复制到 /boot。
• 创建 symlinks 到 /boot。
• 添加自定义内容到initramfs中，如涉及加密的文件，引导启动图像，额外的模块等等。
• 配置 bootloader 来启动新创建的内核和initramfs。

附注
To use /efi instead of /boot for newer UEFI systems, see Changing the boot directory to /efi.

附注
一个常见误解是 genkernel 会“自动”生成自定义内核配置。 genkernel 自动化内核构建过程并组装 initramfs，但“不”生成自定义内核配置文件。它使用通用内核配置文件，该文件在特定于体系结构的基础上为常用子系统提供支持。有关架构默认值的详细信息，请参见 上游存储库。选择架构，然后选择内核配置文件。

安装

USE 标记

USE flags for sys-kernel/genkernel Gentoo automatic kernel building scripts

+firmware	Prefer system firmware sys-kernel/linux-firmware over local copy.
ibm	Add support for IBM ppc64 specific systems

Data provided by the Gentoo Package Database · Last update: 2024-09-12 18:37 More information about USE flags

Emerge

启动genkernel安装：

root #emerge --ask sys-kernel/genkernel

Usage

genkernel的调用的一般形式如下：

root #genkernel [选项 ...] action

选项

Genkernel 的实际行为取决于繁多的选项，其中大部分可以在/etc/genkernel.conf 文件中设置/取消设置或在每次调用时通过 genkernel 命令。通过在命令行的选项设置优先于在 /etc/genkernel.conf 中定义的选项。配置文件被很好的记录，然而一些最常用的选项将在这篇文章中探讨。我们的目的是让读者熟悉常见的 genkernel 调用。如果你需要一套更完整的解释，请参阅 /etc/genkernel.conf 本身中的注释或 man genkernel 的输出。

附注
Some of the options have a variant that triggers a converse behavior figured as --[no-]option_name, and the converse effect is shown in square brackets as in the following example:

代码 Enable or disable a certain option

--[no-]menuconfig : Activates [deactivates] ...

Where options have only a negative effect, the no-, and its effect, which are not optional in this case, are figured without square brackets.

用户交互选项

下面列出的配置选项可以帮助用户决定如何与配置流程进行交互。用户甚至可以选择应保存在进程中创建的配置文件。下面被视为主要的配置选项 ︰

--config=/path/to/genkernel.conf

指定Genkernel使用哪一份配置文件 (默认为 /etc/genkernel.conf)。

--[no-]menuconfig

构建内核之前(不)执行make menuconfig命令 (调用内核的交互式配置菜单) 。

--gconfig

提供一个依赖于GTK+库的图形化内核配置工具。该选项的好处在于大部分用户觉得这样配置更简单和清晰，因为提供了图形化界面。缺点在于，因为需要X窗口才能运行，无法在命令行中使用。

--xconfig

提供一个依赖于QT库的图形化内核配置工具。该选项的好处在于大部分用户觉得这样配置更简单和清晰，因为提供了图形化界面。缺点在于，因为需要X窗口才能运行，无法在命令行中使用。

--[no-]save-config

在/etc/kernels目录下(不)保存内核配置到文件中，以便之后使用。

--kernname=NickName

允许自定义安装到/boot目录下的内核和initrd镜像的文件名，产生的文件名形如kernel-NickName-version和initramfs-NickName-version。

根据所得到的系统的选项

此处列出的配置选项定义哪些功能会或不会在生成内核和 initrd 中启用。

Option	Description
--[no-]splash	Activates (or deactivates) support for Fbsplash framebuffer splash in the genkernel-built initrd image. To override the default theme used by fbsplash, use --splash=PreferredTheme (where PreferredTheme is the title of one of the directories inside the /etc/splash directory).
--splash-res=PreferredResolution	This option allows to select which splash screen resolutions will be supported in the initrd during the start-up of the system. This is useful for two reasons. First, to be able to select only the splash screen resolution(s) relevant to the system. Second, to avoid the unnecessary increase in the disk space required by initrd (since the initrd does not have to support resolutions that are irrelevant for the system's configuration.) However, the option is best omitted if the kernel is being compiled for an Installation CD; this allows splash support for all possible resolutions.
--do-keymap-auto	Force keymap selection during the boot sequence.
--lvm	Includes support for storage using via Logical Volume Management (LVM2) from static binaries, if available to the system. Relevant (static) LVM2 binaries are compiled if they are unavailable. Be sure to install the sys-fs/lvm2 package on the system (emerge sys-fs/lvm2) before enabling this option, then review the LVM article on the Gentoo wiki.
--dmraid	Includes support for DMRAID; the utility which creates RAID mappings using the kernel device-mapper subsystem. DMRAID discovers, activates, deactivates and displays properties of software RAID sets (ATARAID, for example) and contained DOS partitions.
--luks	Includes support for Linux Unified Key Setup or LUKS. This will allow to use a device encrypted by LUKS which contains the root filesystem. On the bootloader, set that encrypted device as the value of crypt_root (and root shall be the unencrypted device LUKS creates).
--disklabel	Adds support for disk label and UUID support to the initrd.
--iscsi	Adds support for iSCSI to the initrd.
--multipath	Adds support for Multipath to the initrd.
--linuxrc=/path/to/the/linuxrc_file	Specifies a user-created linuxrc — a script that is initialized during the start-up stage of the kernel, prior to the actual boot process. A default linuxrc script can be found in the /usr/share/genkernel/ directory. This script allows booting into a small, modularized kernel; it tries to load the minimum amount of drivers that are needed (as modules) by the system.
--cachedir=/path/to/alt/dir	Overrides the default cache location used while compiling the kernel.
--tempdir=/path/to/new/tempdir	Specifies the location of the temporary directory used by genkernel while compiling the kernel.
--unionfs	Includes support for the Unification File System in the initrd image.
--mountboot	Detects whether or not the /boot directory needs to be mounted on a separate partition. It will check /etc/fstab script for instructions on how to mount the boot partition on a file system (if needed).

= =用于建造building 的工具选择的选项

以下选项支持 genkernel以及通过传递给相关的应用程序当内核正在构建组装。这些选项会在内核编译过程中影响编译的工具，即使是在较低水平上。

Options	Description
--kernel-cc=someCompiler	Specifies the compiler employed during the kernel compilation process.
--kernel-ld=someLinker	Specifies the linker employed during the kernel compilation process.
--kernel-as=someAssembler	Specifies the assembler employed during the kernel compilation process.
--kernel-make=someMake	Specifies an alternative to the GNU make utility employed during the kernel compilation process.
--utils-cc=someCompiler	Specifies the compiler employed during the compilation of support utilities.
--utils-ld=someLinker	Specifies the linker employed during the compilation of support utilities.
--utils-as=someAssembler	Specifies the assembler employed during the compilation of support utilities.
--utils-make=someMake	Specifies an alternative to the GNU make utility employed during the compilation of support utilities.
--makeopts=-jX	Specifies the number of concurrent threads that the make utility can implement while the kernel (and utilities) are being compiled. The variable X is a number to be freely chosen, although the most common values are obtained by adding one (1) to the number of cores used by the system, or just use the number of cores on the system. So, for a system with one core, most common option values are -j2 or -j1; a system with two cores most likely uses the -j3 or -j2 options, and so on. (A system with one processor that supports Hyper-Threading™ (HT) Technology can be assumed to have 2 cores, provided Symmetric Multi-Processing (SMP) support is enabled in the kernel.)

作用于编译过程的选项

The following options usually take effect during the actual compilation:

Option	Description
--kerneldir=/path/to/sources/	Specifies an alternative kernel source location, rather than the default /usr/src/linux/ location.
--kernel-config=/path/to/config-file	Specifies what alternative kernel configuration will be used, rather than the default /path/to/sources/.config file.
--module-prefix=/path/to/prefix-directory/	Specifies a prefix to the directory where kernel modules will be installed (default path is the /lib/modules directory.)
--[no-]clean	Activates (or deactivates) the make clean command before compiling the kernel. The make clean command removes all object files and dependencies from the kernel's source tree.
--[no-]mrproper	Activates (or deactivates) the make mrproper command before kernel compilation. Like the make clean command listed above, make mrproper removes all object files and dependencies from the kernel's source tree. However, any previous configuration files (in /path/to/sources/.config or /path/to/sources/.config.old) will also be purged from the kernel's source tree. If it is undesirable that the kernel's .config file keeps disappearing, be sure to disable this option!
--oldconfig	Issues the make oldconfig command, which attempts to collect configuration information for the system's architecture from a generic script in /usr/share/genkernel. This is a non-interactive process; no user input is entertained. Also, if --oldconfig is used in conjunction with --clean, the latter option is negated, resulting in the activation of the --no-clean option.
--callback="echo hello"	Calls the specified arguments (echo hello, in this case) after the kernel and the relevant modules have been built, but before building the initrd image. This may be useful when installing external modules in the initrd image by emerging the relevant item(s) with the callback feature, and then redefining a genkernel module group.
--[no-]install	Activates (or deactivates) the make install command, which installs the new kernel image, configuration file, initrd image and system map onto the boot partition. Any compiled modules will be installed as well. By default genkernel will attempt mount /boot if it is on a separate partition before running the install command.
--no-ramdisk-modules	Refrains from copying any modules to the genkernel-created initrd image. This option is an exception to the rule about the no- prefix; omission of this prefix creates an invalid genkernel option.
--all-ramdisk-modules	Copies all available modules to the genkernel-created initrd image.
--genzimage	Creates the initrd image, prior to the kernel image (this hack currently applies only to PPC Pegasos systems).

调试选项

The use of debugging options during the kernel compilation process controls the amount of information reported, as well as the presentation of said data.

Option	Description
--loglevel=<0|1|2|3|4|5>	Controls the level of verbosity for information provided by genkernel. The variable <verblevel> is an integer between 0 and 5. The level '0' represents minimal output, while '5' provides as much information as possible about genkernel's activities during the kernel compilation process.
--logfile=/path/to/output_file	Ignores the value set by the --loglevel option (above) and sends all debugging data produced by genkernel to the specified output file. Outputs to /var/log/genkernel.log by default.
--[no-]color	Activates (or deactivates) colored output of debugging information (reported by genkernel) using escape sequences.
--[no-]debug-cleanup	Activates (or deactivates) the full post-run cleanup for debug purposes.

选项

The action passed on the command line with the genkernel [options …] action tells genkernel what action to perform. The following actions are supported:

Action	Description
all	Builds all stages — the initrd, kernel image and modules.
bzImage	Only builds the kernel image.
kernel	Only builds the kernel image and modules.
initramfs	Only builds the initramfs/ramdisk image.
ramdisk	Only builds the initramfs/ramdisk image.

配置

开始

Although there are several ways to run genkernel, the least-intrusive approach recommended for most users is provided by genkernel all. Here, a generic configuration which works well for most systems is used. As was mentioned earlier, this approach is not without drawbacks; most of the modules created are useless to the average user and may increase compile time. Below is an illustration of a more efficient approach, achieved by passing certain options to genkernel as root:

root #genkernel --splash --no-install --no-clean --menuconfig all

The above operation causes genkernel to create a kernel capable to open LUKS and LUKS2 encrypted volumes, compile and embed cryptsetup into initramfs (--luks), both kernel and initramfs will have to be manually installed (--no-install). While preparing the kernel source tree, genkernel will refrain from cleaning out any preexisting object files present in the source tree (--no-clean). A menu-driven kernel configuration utility will be displayed that allows the user to select which modules will be built for the system (--menuconfig).

Replacing --no-install with the --install option allows genkernel to automatically install the new kernel in the /boot directory, and will create symlinks if --symlink is specified. Using the --mountboot option allows genkernel to mount the /boot partition automatically, if necessary.

附注
Don't forget that the /etc/genkernel.conf file is sourced by the genkernel command at startup, and that any option defined there will be applied, except where a command line option takes precedence over it.

Changing the boot directory to /efi

It is now recommended to mount the UEFI system boot partition (ESP) under /efi instead of /boot.

By default, the kernel is written to /boot, which used to be the ESP in certain configurations, but is now on the root partition. Reasons to write the kernel to /efi include:

• Secure Boot expecting a hard coded ESP kernel path
• Making GRUB2 independent of the root partition for stability or security
• GRUB2 not supporting the root file-system (bcachefs)
• Using a grub.cfg not generated by grub-mkconfig

To point genkernel to /efi, either add --bootdir=/efi to the genkernel command or BOOTDIR="/efi" to /etc/genkernel.conf.

文件 /etc/genkernel.confChanging the boot directory to /efi in /etc/genkernel.conf

# Set the boot directory, default is /boot
BOOTDIR="/efi"

改变内核

做的第一件事应该是允许在 /etc/genkernel.conf 文件中触发 make menuconfig：

文件 /etc/genkernel.conf强制使用 /etc/genkernel.conf 中的配置菜单

# Run 'make menuconfig' before compiling this kernel?
MENUCONFIG="yes"

文件管理

While using genkernel, the user has to be aware of some aspects relating to kernel configuration and kernel image files management and the way the kernel sources are handled by the system.

源文件

After issuing emerge -u gentoo-sources, a directory is created under /usr/src/ to store new sources. Normally, the active kernel sources directory is pointed to by the /usr/src/linux symlink.

/usr/src 目录可能看起来像这样：

user $ls -l /usr/src

total 16
lrwxrwxrwx  1 root root   19 21 Mar   2013 linux -> linux-3.7.10-gentoo
drwxr-xr-x 24 root root 4096 25 Aug  10:39 linux-3.10.7-gentoo
drwxr-xr-x 20 root root 4096 21 Apr  19:42 linux-3.7.10-gentoo
drwxr-xr-x 21 root root 4096 14 Mar   2013 linux-3.7.9-gentoo

/usr/src/linux 符号链接可以通过不同方式更改。

• If the symlink USE is set the /usr/src/linux symlink is automatically updated to point to the newly emerged sources.

• If the symlink USE is not set, the user can change the destination of the symlink using the eselect kernel list followed by the eselect kernel set command.

genkernel will always (exclusively) use the sources pointed by the /usr/src/linux symlink.

内核配置文件

If a kernel compilation has already been run with the active kernel sources, there might be a file inside the /etc/kernels directory that contains the kernel configuration that has been applied while creating the last bzImage of the kernel. This file is named, for example kernel-config-5.3.14-gentoo-r1-x86_64-wifitest2 where x86_64 might be substituted with the system's architecture, 5.3.14-gentoo-r1 might be substituted with the package/version of the sources used, and wifitest2 with the LOCALVERSION appended user value.

It is this kernel-config-5.3.14-gentoo-r1-x86_64-wifitest2 file that is used as a starting configuration when running  genkernel --menuconfig all.

If it is the first time that genkernel is run with the new kernel sources, or if the previous result has not been saved, this file is substituted with a default configuration file that resides at usr/share/genkernel/arch/x86_64/generated-config where x86_64 is substituted with the actual architecture.

附注
The path to this default configuration file, may be altered by setting the DEFAULT_KERNEL_CONFIG variable in /etc/genkernel.conf file

.

保存编译的配置

If the --save-config genkernel option is activated, either from the command line or inside /etc/genkernel.conf, the compiled kernel configuration is saved (with the name given above) into the /etc/kernels directory. At the same time, the configuration is saved in the .config file in /usr/src/linux directory but this file is not reused on the next genkernel all run.

警告
One has to be aware, that each time genkernel is run, with the --save-config genkernel option set, the configuration file in /etc/kernels is overridden. Thus, it is highly recommended to copy this file under a new name before running genkernel in order to preserve it.

= 安装内核和 initramfs 到 /boot 目录

Specifying the --install option when invoking genkernel, will ask genkernel to install the kernel image and the initramfs into the /boot directory. In order to run --install a convenient manner, set the following in the /etc/genkernel.conf file:

文件 /etc/genkernel.conf设置内核和 initramfs 自动保存

# Mount BOOTDIR automatically if it is not mounted?
MOUNTBOOT="yes"
  
# Save the new configuration in /etc/kernels upon
# successful compilation
SAVE_CONFIG="yes"
  
# Make symlinks in BOOTDIR automatically?
SYMLINK="yes"
  
# Add new kernel to grub2?
BOOTLOADER="grub2"

• 第一个参数不言自明。

• 第二个参数告诉 genkernel 将编译好的内核配置保存到 /etc/kernels

• The last two options tell genkernel to automatically update the grub configuration. In practice, the following happens:
  • If a previous kernel image with the same name already exist, it is renamed by appending .old to its name. A symlink kernel.old is automatically created that points to it.
  • The new kernel takes the place of any kernel with the same name into /boot. If it is the first time a kernel is compiled, a symlink kernel is automatically created that points to the new kernel.

运行 genkernel --menuconfig all 后，/boot 目录可能如下所示：

user $ls -al /boot

total 41336
drwxr-xr-x  3 root root    4096 20 avril 17:23 .
drwxr-xr-x 24 root root    4096 15 sept. 12:31 ..
lrwxrwxrwx  1 root root       1 24 févr.  2013 boot -> .
drwxr-xr-x  2 root root    4096 24 févr.  2013 grub
lrwxrwxrwx  1 root root      40 20 avril 17:23 initramfs -> initramfs-genkernel-x86_64-3.7.10-gentoo
-rw-r--r--  1 root root 1314412 20 avril 17:23 initramfs-genkernel-x86_64-3.7.10-gentoo
-rw-r--r--  1 root root 1313548 21 mars   2013 initramfs-genkernel-x86_64-3.7.10-gentoo.old
-rw-r--r--  1 root root 1295344 25 févr.  2013 initramfs-genkernel-x86_64-3.7.9-gentoo
-rw-r--r--  1 root root 3310324 25 févr.  2013 initramfs-genkernel-x86_64-3.7.9-gentoo.old
lrwxrwxrwx  1 root root      44 20 avril 17:23 initramfs.old -> initramfs-genkernel-x86_64-3.7.10-gentoo.old
lrwxrwxrwx  1 root root      37 20 avril 17:23 kernel -> kernel-genkernel-x86_64-3.7.10-gentoo
-rw-r--r--  1 root root 4866656 20 avril 17:23 kernel-genkernel-x86_64-3.7.10-gentoo
-rw-r--r--  1 root root 4866560 21 mars   2013 kernel-genkernel-x86_64-3.7.10-gentoo.old
-rw-r--r--  1 root root 4552288 25 févr.  2013 kernel-genkernel-x86_64-3.7.9-gentoo
-rw-r--r--  1 root root 3400736 25 févr.  2013 kernel-genkernel-x86_64-3.7.9-gentoo.old
lrwxrwxrwx  1 root root      41 20 avril 17:23 kernel.old -> kernel-genkernel-x86_64-3.7.10-gentoo.old

配置 bootloader

extlinux

TODO

GRUB Legacy

警告
The following text is about GRUB Legacy which was removed in Gentoo in February 2019. If at all possible, please migrate to GRUB2 as soon as possible.

The symlinks presented above in the bootloader's configuration can be used so that, even if the new kernel is not bootable, the user can always boot on the old one.

To allow the kernel and intird provided by genkernel to run correctly, provide a minimum information in bootloader's configuration file:

• Add root=/dev/sdaN to the kernel parameters passed to the kernel image, where /dev/sdaN points to the root partition (N is the number of the partition if a partition exists).
• If splash is used, add a suitable mode line such as vga=0x317 to the parameters passed to the kernel and also add splash=verbose or splash=silent depending on the verboseness required through the boot process.
• Add the initrd information as required by the bootloader. Consult the Bootloader Configuration Chapter of the Gentoo Handbook for details on how to make the bootloader initrd-aware.

以下是 grub.conf 文件可能的样式。

文件 /boot/grub/grub.confAn example of grub.conf file

# This is a sample grub.conf for use with Genkernel, per the Gentoo handbook 
# http://www.gentoo.org/doc/en/handbook/handbook-x86.xml?part=1&chap=10#doc_chap2 
# If you are not using Genkernel and you need help creating this file, you 
# should consult the handbook. Alternatively, consult the grub.conf.sample that 
# is included with the Grub documentation. 
  
default 0 
timeout 5
splashimage=(hd1,0)/boot/grub/splash.xpm.gz 
   
title Gentoo Linux 
root (hd0,6) 
kernel /boot/kernel initrd=/dev/ram0 root=/dev/sda7 rootfstype=ext4  
initrd /boot/initramfs
  
title Gentoo Linux old kernel 
root (hd0,6) 
kernel /boot/kernel.old initrd=/dev/ram0 root=/dev/sda7 rootfstype=ext4 
initrd /boot/initramfs.old

GRUB

TODO

systemd-boot

TODO

保存工作文件

The genkernel application automatically saves new changes to the files. If previous changes are to be preserved, then the following actions need to be taken.

• The first file to preserve is the kernel configuration file in /etc/kernels/ If the source has not changed prior to the recompilation of the kernel, the previously used name for this file will be used. So copying the previous configuration file under a different name helps in preserving the information while keeping the file available as a starting point for a new configuration.

• The second important thing is to preserve the already bootable kernel and initramfs images. The way to accomplish this depends on the context:

1. If the last kernel compiled is bootable, running genkernel will rename this kernel (and similarly initramfs) image to vmlinuz-$KV.old and create a new vmlinux-$KV. This mean that even if the new kernel is not bootable, users will always be able to boot the old one.
2. If the last kernel compiled is not bootable and sources haven't changed since the user compiled a bootable one, prior to running genkernel, first delete the new kernel image and remove the .old suffix from the last bootable one. Without this, if the newly compiled kernel is not bootable for the second time, the bootable vmlinuz-$KV.old will be kicked out by the renaming of the non bootable vmlinuz-$KV, giving the user an unbootable system. Use the same reasoning for initramfs.

附注
Since genkernel-4, it is recommended to create new, independent revisions each with its own kernel image, initramfs and installed modules in /lib/modules using genkernel --kernel-append-localversion=-my-new-revision all.

在更改源时使用以前的内核配置

The previous configuration can be used through the MENUCONFIG variable in /etc/genkernel.conf as follows:

文件 /etc/genkernel.conf设置 make menuconfig

# Run 'make menuconfig' before compiling this kernel?
MENUCONFIG="yes"

附注
There is no need to manually run make oldconfig when using genkernel, even if the sources are changed. This is because make menuconfig will try to load the previous configuration into the menu as much as possible. Nevertheless, reviewing each option and new sections carefully is recommended.

在启动前检查 initramfs 是否包含必要的实用程序

Before booting the system, it might be wise checking that initramfs includes necessary utilities and modules. For example, to utilize remote unlock capabilities for a headless system using LUKS, ensure that kernel modules for the network interface card, dropbear, and cryptsetup have been included.

Using lsinitrd

Since genkernel-4, created initramfs can be processed using the lsinitrd command from the sys-kernel/dracut package:

user $lsinitrd /boot/initramfs-5.3.14-gentoo-r1-x86_64-wifitest2.img

Image: /boot/initramfs-5.3.14-gentoo-r1-x86_64-wifitest2.img: 4,5M
========================================================================
Version: Genkernel 4.0.1 (2019-12-16 00:48:10 UTC)
 
Arguments: --boot-font=none --keymap --compress-initramfs --no-microcode-initramfs --ramdisk-modules --busybox --no-btrfs --no-iscsi --no-multipath --no-dmraid --mdadm --lvm --no-unionfs --no-zfs --no-splash --no-strace --no-gpg --luks --no-firmware --firmware-dir=/lib/firmware --ssh --no-e2fsprogs --no-xfsprogs
 
dracut modules:
========================================================================
drwxr-xr-x  16 root     root            0  Dec 16 01:49 .
drwxr-xr-x   2 root     root            0  Dec 16 01:49 bin
lrwxrwxrwx   1 root     root            7  Dec 16 01:49 bin/ash -> busybox
lrwxrwxrwx   1 root     root            7  Dec 16 01:49 bin/[ -> busybox
-rwxr-xr-x   1 root     root      2351376  Dec 16 01:49 bin/busybox
lrwxrwxrwx   1 root     root            7  Dec 16 01:49 bin/cat -> busybox
lrwxrwxrwx   1 root     root            7  Dec 16 01:49 bin/cut -> busybox
lrwxrwxrwx   1 root     root            7  Dec 16 01:49 bin/echo -> busybox
lrwxrwxrwx   1 root     root            7  Dec 16 01:49 bin/mknod -> busybox
lrwxrwxrwx   1 root     root            7  Dec 16 01:49 bin/mount -> busybox
lrwxrwxrwx   1 root     root            7  Dec 16 01:49 bin/sh -> busybox
lrwxrwxrwx   1 root     root            7  Dec 16 01:49 bin/uname -> busybox
drwxr-xr-x   2 root     root            0  Dec 16 01:49 dev
drwxr-xr-x   8 root     root            0  Dec 16 01:49 etc
-rw-r--r--   1 root     root           24  Dec 16 01:49 etc/build_date
-rw-r--r--   1 root     root           16  Dec 16 01:49 etc/build_id
drwxr-xr-x   2 root     root            0  Dec 16 01:49 etc/dropbear
-rw-------   1 root     root          140  Dec 16 01:49 etc/dropbear/dropbear_ecdsa_host_key
-rw-------   1 root     root          806  Dec 16 01:49 etc/dropbear/dropbear_rsa_host_key
prw-r--r--   1 root     root            0  Dec 16 01:49 etc/dropbear/fifo_root
prw-r--r--   1 root     root            0  Dec 16 01:49 etc/dropbear/fifo_swap
-rw-r--r--   1 root     root           97  Dec 16 01:49 etc/fstab
-rw-r--r--   1 root     root           14  Dec 16 01:49 etc/group
-rw-r--r--   1 root     root         3742  Dec 16 01:49 etc/initrd.defaults
-rw-r--r--   1 root     root        69232  Dec 16 01:49 etc/initrd.scripts
-rw-r--r--   1 root     root          441  Dec 16 01:49 etc/ld.so.cache
-rw-r--r--   1 root     root           78  Dec 16 01:49 etc/ld.so.conf
drwxr-xr-x   2 root     root            0  Dec 16 01:49 etc/ld.so.conf.d
-rw-r--r--   1 root     root           81  Dec 16 01:49 etc/ld.so.conf.d/05gcc-x86_64-pc-linux-gnu.conf
-rw-r--r--   1 root     root         2298  Dec 16 01:49 etc/localtime
drwxr-xr-x   3 root     root            0  Dec 16 01:49 etc/lvm
drwxr-xr-x   2 root     root            0  Dec 16 01:49 etc/lvm/cache
-rw-r--r--   1 root     root        95231  Dec 16 01:49 etc/lvm/lvm.conf
-rw-r--r--   1 root     root         2882  Dec 16 01:49 etc/mdadm.conf
drwxr-xr-x   3 root     root            0  Dec 16 01:49 etc/mdev
-rw-r--r--   1 root     root         1172  Dec 16 01:49 etc/mdev.conf
drwxr-xr-x   2 root     root            0  Dec 16 01:49 etc/mdev/helpers
-rwxr-xr-x   1 root     root          666  Dec 16 01:49 etc/mdev/helpers/nvme
-rwxr-xr-x   1 root     root         1295  Dec 16 01:49 etc/mdev/helpers/storage-device
drwxr-xr-x   2 root     root            0  Dec 16 01:49 etc/modprobe.d
-rw-r--r--   1 root     root         1186  Dec 16 01:49 etc/modprobe.d/aliases.conf
-rw-r--r--   1 root     root          122  Dec 16 01:49 etc/modprobe.d/i386.conf
drwxr-xr-x   2 root     root            0  Dec 16 01:49 etc/modules
-rw-r--r--   1 root     root           24  Dec 16 01:49 etc/modules/ataraid
-rw-r--r--   1 root     root           21  Dec 16 01:49 etc/modules/block
-rw-r--r--   1 root     root          180  Dec 16 01:49 etc/modules/crypto
-rw-r--r--   1 root     root           26  Dec 16 01:49 etc/modules/dmraid
-rw-r--r--   1 root     root           23  Dec 16 01:49 etc/modules/firewire
-rw-r--r--   1 root     root          123  Dec 16 01:49 etc/modules/fs
-rw-r--r--   1 root     root           86  Dec 16 01:49 etc/modules/hyperv
-rw-r--r--   1 root     root           40  Dec 16 01:49 etc/modules/iscsi
-rw-r--r--   1 root     root          437  Dec 16 01:49 etc/modules/lvm
-rw-r--r--   1 root     root          194  Dec 16 01:49 etc/modules/mdadm
-rw-r--r--   1 root     root           75  Dec 16 01:49 etc/modules/multipath
-rw-r--r--   1 root     root          214  Dec 16 01:49 etc/modules/net
-rw-r--r--   1 root     root           56  Dec 16 01:49 etc/modules/nvme
-rw-r--r--   1 root     root          519  Dec 16 01:49 etc/modules/pata
-rw-r--r--   1 root     root           83  Dec 16 01:49 etc/modules/pcmcia
-rw-r--r--   1 root     root          158  Dec 16 01:49 etc/modules/sata
-rw-r--r--   1 root     root          523  Dec 16 01:49 etc/modules/scsi
-rw-r--r--   1 root     root          350  Dec 16 01:49 etc/modules/usb
-rw-r--r--   1 root     root          133  Dec 16 01:49 etc/modules/virtio
-rw-r--r--   1 root     root           15  Dec 16 01:49 etc/modules/waitscan
-rw-r--r--   1 root     root           47  Dec 16 01:49 etc/passwd
-rw-r-----   1 root     root           22  Dec 16 01:49 etc/shadow
-rw-r--r--   1 root     root           25  Dec 16 01:49 etc/shells
-rwxr-xr-x   1 root     root        32331  Dec 16 01:49 init
drwxr-xr-x   2 root     root            0  Dec 16 01:49 .initrd
drwxr-xr-x   6 root     root            0  Dec 16 01:49 lib
lrwxrwxrwx   1 root     root            3  Dec 16 01:49 lib32 -> lib
lrwxrwxrwx   1 root     root            3  Dec 16 01:49 lib64 -> lib
drwxr-xr-x   2 root     root            0  Dec 16 01:49 lib/console
drwxr-xr-x   2 root     root            0  Dec 16 01:49 lib/dracut
-rw-r--r--   1 root     root          312  Dec 16 01:49 lib/dracut/build-parameter.txt
-rw-r--r--   1 root     root           42  Dec 16 01:49 lib/dracut/dracut-gk-version.info
drwxr-xr-x   2 root     root            0  Dec 16 01:49 lib/keymaps
lrwxrwxrwx   1 root     root            9  Dec 16 01:49 lib/keymaps/10.map -> croat.map
lrwxrwxrwx   1 root     root            6  Dec 16 01:49 lib/keymaps/11.map -> cz.map
lrwxrwxrwx   1 root     root            6  Dec 16 01:49 lib/keymaps/12.map -> de.map
lrwxrwxrwx   1 root     root            6  Dec 16 01:49 lib/keymaps/13.map -> dk.map
lrwxrwxrwx   1 root     root           10  Dec 16 01:49 lib/keymaps/14.map -> dvorak.map
lrwxrwxrwx   1 root     root            6  Dec 16 01:49 lib/keymaps/15.map -> es.map
lrwxrwxrwx   1 root     root            6  Dec 16 01:49 lib/keymaps/16.map -> et.map
lrwxrwxrwx   1 root     root            6  Dec 16 01:49 lib/keymaps/17.map -> fi.map
lrwxrwxrwx   1 root     root            6  Dec 16 01:49 lib/keymaps/18.map -> fr.map
lrwxrwxrwx   1 root     root            6  Dec 16 01:49 lib/keymaps/19.map -> gr.map
lrwxrwxrwx   1 root     root           10  Dec 16 01:49 lib/keymaps/1.map -> azerty.map
lrwxrwxrwx   1 root     root            6  Dec 16 01:49 lib/keymaps/20.map -> hu.map
lrwxrwxrwx   1 root     root            6  Dec 16 01:49 lib/keymaps/21.map -> il.map
lrwxrwxrwx   1 root     root            6  Dec 16 01:49 lib/keymaps/22.map -> is.map
lrwxrwxrwx   1 root     root            6  Dec 16 01:49 lib/keymaps/23.map -> it.map
lrwxrwxrwx   1 root     root            6  Dec 16 01:49 lib/keymaps/24.map -> jp.map
lrwxrwxrwx   1 root     root            6  Dec 16 01:49 lib/keymaps/25.map -> la.map
lrwxrwxrwx   1 root     root            6  Dec 16 01:49 lib/keymaps/26.map -> lt.map
lrwxrwxrwx   1 root     root            6  Dec 16 01:49 lib/keymaps/27.map -> mk.map
lrwxrwxrwx   1 root     root            6  Dec 16 01:49 lib/keymaps/28.map -> nl.map
lrwxrwxrwx   1 root     root            6  Dec 16 01:49 lib/keymaps/29.map -> no.map
lrwxrwxrwx   1 root     root            6  Dec 16 01:49 lib/keymaps/2.map -> be.map
lrwxrwxrwx   1 root     root            6  Dec 16 01:49 lib/keymaps/30.map -> pl.map
lrwxrwxrwx   1 root     root            6  Dec 16 01:49 lib/keymaps/31.map -> pt.map
lrwxrwxrwx   1 root     root            6  Dec 16 01:49 lib/keymaps/32.map -> ro.map
lrwxrwxrwx   1 root     root            6  Dec 16 01:49 lib/keymaps/33.map -> ru.map
lrwxrwxrwx   1 root     root            6  Dec 16 01:49 lib/keymaps/34.map -> se.map
lrwxrwxrwx   1 root     root            6  Dec 16 01:49 lib/keymaps/35.map -> sf.map
lrwxrwxrwx   1 root     root            6  Dec 16 01:49 lib/keymaps/36.map -> sg.map
lrwxrwxrwx   1 root     root            8  Dec 16 01:49 lib/keymaps/37.map -> sk-y.map
lrwxrwxrwx   1 root     root            8  Dec 16 01:49 lib/keymaps/38.map -> sk-z.map
lrwxrwxrwx   1 root     root           11  Dec 16 01:49 lib/keymaps/39.map -> slovene.map
lrwxrwxrwx   1 root     root            8  Dec 16 01:49 lib/keymaps/3.map -> bepo.map
lrwxrwxrwx   1 root     root            7  Dec 16 01:49 lib/keymaps/40.map -> trf.map
lrwxrwxrwx   1 root     root            6  Dec 16 01:49 lib/keymaps/41.map -> ua.map
lrwxrwxrwx   1 root     root            6  Dec 16 01:49 lib/keymaps/42.map -> uk.map
lrwxrwxrwx   1 root     root            6  Dec 16 01:49 lib/keymaps/43.map -> us.map
lrwxrwxrwx   1 root     root           10  Dec 16 01:49 lib/keymaps/44.map -> wangbe.map
lrwxrwxrwx   1 root     root            6  Dec 16 01:49 lib/keymaps/4.map -> bg.map
lrwxrwxrwx   1 root     root            8  Dec 16 01:49 lib/keymaps/5.map -> br-a.map
lrwxrwxrwx   1 root     root            8  Dec 16 01:49 lib/keymaps/6.map -> br-l.map
lrwxrwxrwx   1 root     root            6  Dec 16 01:49 lib/keymaps/7.map -> by.map
lrwxrwxrwx   1 root     root            6  Dec 16 01:49 lib/keymaps/8.map -> cf.map
lrwxrwxrwx   1 root     root           11  Dec 16 01:49 lib/keymaps/9.map -> colemak.map
-rw-r--r--   1 root     root         2823  Dec 16 01:49 lib/keymaps/azerty.map
-rw-r--r--   1 root     root         2823  Dec 16 01:49 lib/keymaps/be.map
-rw-r--r--   1 root     root         2823  Dec 16 01:49 lib/keymaps/bepo.map
-rw-r--r--   1 root     root         2823  Dec 16 01:49 lib/keymaps/bg.map
-rw-r--r--   1 root     root         2823  Dec 16 01:49 lib/keymaps/br-a.map
-rw-r--r--   1 root     root         2823  Dec 16 01:49 lib/keymaps/br-l.map
-rw-r--r--   1 root     root         2823  Dec 16 01:49 lib/keymaps/by.map
-rw-r--r--   1 root     root         2823  Dec 16 01:49 lib/keymaps/cf.map
-rw-r--r--   1 root     root         2823  Dec 16 01:49 lib/keymaps/colemak.map
-rw-r--r--   1 root     root         2823  Dec 16 01:49 lib/keymaps/croat.map
-rw-r--r--   1 root     root         2823  Dec 16 01:49 lib/keymaps/cz.map
-rw-r--r--   1 root     root         2823  Dec 16 01:49 lib/keymaps/de.map
-rw-r--r--   1 root     root         2823  Dec 16 01:49 lib/keymaps/dk.map
-rw-r--r--   1 root     root         2823  Dec 16 01:49 lib/keymaps/dvorak.map
-rw-r--r--   1 root     root         2823  Dec 16 01:49 lib/keymaps/es.map
-rw-r--r--   1 root     root         2823  Dec 16 01:49 lib/keymaps/et.map
-rw-r--r--   1 root     root         2823  Dec 16 01:49 lib/keymaps/fi.map
-rw-r--r--   1 root     root         2823  Dec 16 01:49 lib/keymaps/fr.map
-rw-r--r--   1 root     root         2823  Dec 16 01:49 lib/keymaps/gr.map
-rw-r--r--   1 root     root         2823  Dec 16 01:49 lib/keymaps/hu.map
-rw-r--r--   1 root     root         2823  Dec 16 01:49 lib/keymaps/il.map
-rw-r--r--   1 root     root         2823  Dec 16 01:49 lib/keymaps/is.map
-rw-r--r--   1 root     root         2823  Dec 16 01:49 lib/keymaps/it.map
-rw-r--r--   1 root     root         2823  Dec 16 01:49 lib/keymaps/jp.map
-rw-r--r--   1 root     root          518  Dec 16 01:49 lib/keymaps/keymapList
-rw-r--r--   1 root     root         2823  Dec 16 01:49 lib/keymaps/la.map
-rw-r--r--   1 root     root         2823  Dec 16 01:49 lib/keymaps/lt.map
-rw-r--r--   1 root     root         2823  Dec 16 01:49 lib/keymaps/mk.map
-rw-r--r--   1 root     root         2823  Dec 16 01:49 lib/keymaps/nl.map
-rw-r--r--   1 root     root         2823  Dec 16 01:49 lib/keymaps/no.map
-rw-r--r--   1 root     root         2823  Dec 16 01:49 lib/keymaps/pl.map
-rw-r--r--   1 root     root         2823  Dec 16 01:49 lib/keymaps/pt.map
-rw-r--r--   1 root     root         2823  Dec 16 01:49 lib/keymaps/ro.map
-rw-r--r--   1 root     root         2823  Dec 16 01:49 lib/keymaps/ru.map
-rw-r--r--   1 root     root         2823  Dec 16 01:49 lib/keymaps/se.map
-rw-r--r--   1 root     root         2823  Dec 16 01:49 lib/keymaps/sf.map
-rw-r--r--   1 root     root         2823  Dec 16 01:49 lib/keymaps/sg.map
-rw-r--r--   1 root     root         2823  Dec 16 01:49 lib/keymaps/sk-y.map
-rw-r--r--   1 root     root         2823  Dec 16 01:49 lib/keymaps/sk-z.map
-rw-r--r--   1 root     root         2823  Dec 16 01:49 lib/keymaps/slovene.map
-rw-r--r--   1 root     root         2823  Dec 16 01:49 lib/keymaps/trf.map
-rw-r--r--   1 root     root         2823  Dec 16 01:49 lib/keymaps/ua.map
-rw-r--r--   1 root     root         2823  Dec 16 01:49 lib/keymaps/uk.map
-rw-r--r--   1 root     root         2823  Dec 16 01:49 lib/keymaps/us.map
-rw-r--r--   1 root     root         2823  Dec 16 01:49 lib/keymaps/wangbe.map
-rwxr-xr-x   1 root     root       169376  Dec 16 01:49 lib/ld-linux-x86-64.so.2
-rwxr-xr-x   1 root     root      1913648  Dec 16 01:49 lib/libc.so.6
-rwxr-xr-x   1 root     root        26800  Dec 16 01:49 lib/libnss_dns.so
lrwxrwxrwx   1 root     root           13  Dec 16 01:49 lib/libnss_dns.so.2 -> libnss_dns.so
-rwxr-xr-x   1 root     root        51536  Dec 16 01:49 lib/libnss_files.so
lrwxrwxrwx   1 root     root           15  Dec 16 01:49 lib/libnss_files.so.2 -> libnss_files.so
-rwxr-xr-x   1 root     root        88736  Dec 16 01:49 lib/libresolv.so.2
drwxr-xr-x   3 root     root            0  Dec 16 01:49 lib/modules
drwxr-xr-x   3 root     root            0  Dec 16 01:49 lib/modules/5.3.14-gentoo-r1-x86_64-wifitest2
drwxr-xr-x   5 root     root            0  Dec 16 01:49 lib/modules/5.3.14-gentoo-r1-x86_64-wifitest2/kernel
drwxr-xr-x   2 root     root            0  Dec 16 01:49 lib/modules/5.3.14-gentoo-r1-x86_64-wifitest2/kernel/crypto
-rw-r--r--   1 root     root         7152  Dec 16 01:49 lib/modules/5.3.14-gentoo-r1-x86_64-wifitest2/kernel/crypto/algif_rng.ko
drwxr-xr-x   6 root     root            0  Dec 16 01:49 lib/modules/5.3.14-gentoo-r1-x86_64-wifitest2/kernel/drivers
drwxr-xr-x   3 root     root            0  Dec 16 01:49 lib/modules/5.3.14-gentoo-r1-x86_64-wifitest2/kernel/drivers/hid
drwxr-xr-x   2 root     root            0  Dec 16 01:49 lib/modules/5.3.14-gentoo-r1-x86_64-wifitest2/kernel/drivers/hid/usbhid
-rw-r--r--   1 root     root        66448  Dec 16 01:49 lib/modules/5.3.14-gentoo-r1-x86_64-wifitest2/kernel/drivers/hid/usbhid/usbhid.ko
drwxr-xr-x   2 root     root            0  Dec 16 01:49 lib/modules/5.3.14-gentoo-r1-x86_64-wifitest2/kernel/drivers/md
-rw-r--r--   1 root     root        19024  Dec 16 01:49 lib/modules/5.3.14-gentoo-r1-x86_64-wifitest2/kernel/drivers/md/dm-log.ko
-rw-r--r--   1 root     root        27256  Dec 16 01:49 lib/modules/5.3.14-gentoo-r1-x86_64-wifitest2/kernel/drivers/md/dm-mirror.ko
-rw-r--r--   1 root     root        49200  Dec 16 01:49 lib/modules/5.3.14-gentoo-r1-x86_64-wifitest2/kernel/drivers/md/dm-raid.ko
-rw-r--r--   1 root     root        16536  Dec 16 01:49 lib/modules/5.3.14-gentoo-r1-x86_64-wifitest2/kernel/drivers/md/dm-region-hash.ko
drwxr-xr-x   3 root     root            0  Dec 16 01:49 lib/modules/5.3.14-gentoo-r1-x86_64-wifitest2/kernel/drivers/net
drwxr-xr-x   2 root     root            0  Dec 16 01:49 lib/modules/5.3.14-gentoo-r1-x86_64-wifitest2/kernel/drivers/net/intel
drwxr-xr-x   2 root     root            0  Dec 16 01:49 lib/modules/5.3.14-gentoo-r1-x86_64-wifitest2/kernel/drivers/net/intel/e1000
-rw-r--r--   1 root     root        70480  Dec 16 01:49 lib/modules/5.3.14-gentoo-r1-x86_64-wifitest2/kernel/drivers/net/intel/e1000/e1000.ko
drwxr-xr-x   6 root     root            0  Dec 16 01:49 lib/modules/5.3.14-gentoo-r1-x86_64-wifitest2/kernel/drivers/usb
drwxr-xr-x   2 root     root            0  Dec 16 01:49 lib/modules/5.3.14-gentoo-r1-x86_64-wifitest2/kernel/drivers/usb/common
-rw-r--r--   1 root     root         6584  Dec 16 01:49 lib/modules/5.3.14-gentoo-r1-x86_64-wifitest2/kernel/drivers/usb/common/usb-common.ko
drwxr-xr-x   2 root     root            0  Dec 16 01:49 lib/modules/5.3.14-gentoo-r1-x86_64-wifitest2/kernel/drivers/usb/core
-rw-r--r--   1 root     root       308944  Dec 16 01:49 lib/modules/5.3.14-gentoo-r1-x86_64-wifitest2/kernel/drivers/usb/core/usbcore.ko
drwxr-xr-x   2 root     root            0  Dec 16 01:49 lib/modules/5.3.14-gentoo-r1-x86_64-wifitest2/kernel/drivers/usb/host
-rw-r--r--   1 root     root        60416  Dec 16 01:49 lib/modules/5.3.14-gentoo-r1-x86_64-wifitest2/kernel/drivers/usb/host/ehci-hcd.ko
-rw-r--r--   1 root     root        10616  Dec 16 01:49 lib/modules/5.3.14-gentoo-r1-x86_64-wifitest2/kernel/drivers/usb/host/ehci-pci.ko
-rw-r--r--   1 root     root        46072  Dec 16 01:49 lib/modules/5.3.14-gentoo-r1-x86_64-wifitest2/kernel/drivers/usb/host/ohci-hcd.ko
-rw-r--r--   1 root     root        35896  Dec 16 01:49 lib/modules/5.3.14-gentoo-r1-x86_64-wifitest2/kernel/drivers/usb/host/uhci-hcd.ko
drwxr-xr-x   2 root     root            0  Dec 16 01:49 lib/modules/5.3.14-gentoo-r1-x86_64-wifitest2/kernel/drivers/usb/storage
-rw-r--r--   1 root     root       126512  Dec 16 01:49 lib/modules/5.3.14-gentoo-r1-x86_64-wifitest2/kernel/drivers/usb/storage/usb-storage.ko
drwxr-xr-x   3 root     root            0  Dec 16 01:49 lib/modules/5.3.14-gentoo-r1-x86_64-wifitest2/kernel/fs
drwxr-xr-x   2 root     root            0  Dec 16 01:49 lib/modules/5.3.14-gentoo-r1-x86_64-wifitest2/kernel/fs/fat
-rw-r--r--   1 root     root        95664  Dec 16 01:49 lib/modules/5.3.14-gentoo-r1-x86_64-wifitest2/kernel/fs/fat/fat.ko
-rw-r--r--   1 root     root        16104  Dec 16 01:49 lib/modules/5.3.14-gentoo-r1-x86_64-wifitest2/kernel/fs/fat/msdos.ko
-rw-r--r--   1 root     root        32434  Dec 16 01:49 lib/modules/5.3.14-gentoo-r1-x86_64-wifitest2/modules.alias
-rw-r--r--   1 root     root        42356  Dec 16 01:49 lib/modules/5.3.14-gentoo-r1-x86_64-wifitest2/modules.alias.bin
-rw-r--r--   1 root     root         8132  Dec 16 01:49 lib/modules/5.3.14-gentoo-r1-x86_64-wifitest2/modules.builtin
-rw-r--r--   1 root     root        11529  Dec 16 01:49 lib/modules/5.3.14-gentoo-r1-x86_64-wifitest2/modules.builtin.bin
-rw-r--r--   1 root     root        15196  Dec 16 01:49 lib/modules/5.3.14-gentoo-r1-x86_64-wifitest2/modules.dep
-rw-r--r--   1 root     root        23748  Dec 16 01:49 lib/modules/5.3.14-gentoo-r1-x86_64-wifitest2/modules.dep.bin
-rw-r--r--   1 root     root            0  Dec 16 01:49 lib/modules/5.3.14-gentoo-r1-x86_64-wifitest2/modules.devname
-rw-r--r--   1 root     root         8320  Dec 16 01:49 lib/modules/5.3.14-gentoo-r1-x86_64-wifitest2/modules.order
-rw-r--r--   1 root     root          117  Dec 16 01:49 lib/modules/5.3.14-gentoo-r1-x86_64-wifitest2/modules.softdep
-rw-r--r--   1 root     root        24707  Dec 16 01:49 lib/modules/5.3.14-gentoo-r1-x86_64-wifitest2/modules.symbols
-rw-r--r--   1 root     root        29469  Dec 16 01:49 lib/modules/5.3.14-gentoo-r1-x86_64-wifitest2/modules.symbols.bin
lrwxrwxrwx   1 root     root            4  Dec 16 01:49 linuxrc -> init
drwxr-xr-x   2 root     root            0  Dec 16 01:49 mnt
drwxr-xr-x   2 root     root            0  Dec 16 01:49 proc
drwxr-xr-x   3 root     root            0  Dec 16 01:49 root
drwx------   2 root     root            0  Dec 16 01:49 root/.ssh
-rw-------   1 root     root          742  Dec 16 01:49 root/.ssh/authorized_keys
drwxr-xr-x   2 root     root            0  Dec 16 01:49 run
-rw-r--r--   1 root     root            0  Dec 16 01:49 run/utmp
drwxr-xr-x   2 root     root            0  Dec 16 01:49 sbin
-rwxr-xr-x   1 root     root      1105720  Dec 16 01:49 sbin/blkid
-rwxr-xr-x   1 root     root      2813384  Dec 16 01:49 sbin/cryptsetup
lrwxrwxrwx   1 root     root           19  Dec 16 01:49 sbin/dmsetup -> ../usr/sbin/dmsetup
lrwxrwxrwx   1 root     root           19  Dec 16 01:49 sbin/dmstats -> ../usr/sbin/dmstats
lrwxrwxrwx   1 root     root            7  Dec 16 01:49 sbin/init -> ../init
lrwxrwxrwx   1 root     root           15  Dec 16 01:49 sbin/lvm -> ../usr/sbin/lvm
-rwxr-xr-x   1 root     root      1510360  Dec 16 01:49 sbin/mdadm
-rwxr-xr-x   1 root     root      1267904  Dec 16 01:49 sbin/mdmon
drwxr-xr-x   2 root     root            0  Dec 16 01:49 sys
drwxrwxrwt   2 root     root            0  Dec 16 01:49 tmp
drwxr-xr-x   6 root     root            0  Dec 16 01:49 usr
drwxr-xr-x   2 root     root            0  Dec 16 01:49 usr/bin
lrwxrwxrwx   1 root     root           13  Dec 16 01:49 usr/bin/dropbearconvert -> dropbearmulti
lrwxrwxrwx   1 root     root           13  Dec 16 01:49 usr/bin/dropbearkey -> dropbearmulti
-rwxr-xr-x   1 root     root      1365144  Dec 16 01:49 usr/bin/dropbearmulti
-rwxr-xr-x   1 root     root         2881  Dec 16 01:49 usr/bin/login-remote.sh
lrwxrwxrwx   1 root     root           13  Dec 16 01:49 usr/bin/scp -> dropbearmulti
drwxr-xr-x   2 root     root            0  Dec 16 01:49 usr/lib
lrwxrwxrwx   1 root     root            3  Dec 16 01:49 usr/lib32 -> lib
lrwxrwxrwx   1 root     root            3  Dec 16 01:49 usr/lib64 -> lib
drwxr-xr-x   2 root     root            0  Dec 16 01:49 usr/sbin
lrwxrwxrwx   1 root     root           11  Dec 16 01:49 usr/sbin/cache_check -> pdata_tools
lrwxrwxrwx   1 root     root           11  Dec 16 01:49 usr/sbin/cache_dump -> pdata_tools
lrwxrwxrwx   1 root     root           11  Dec 16 01:49 usr/sbin/cache_metadata_size -> pdata_tools
lrwxrwxrwx   1 root     root           11  Dec 16 01:49 usr/sbin/cache_repair -> pdata_tools
lrwxrwxrwx   1 root     root           11  Dec 16 01:49 usr/sbin/cache_restore -> pdata_tools
lrwxrwxrwx   1 root     root           11  Dec 16 01:49 usr/sbin/cache_writeback -> pdata_tools
-rwxr-xr-x   1 root     root      1262952  Dec 16 01:49 usr/sbin/dmsetup
lrwxrwxrwx   1 root     root            7  Dec 16 01:49 usr/sbin/dmstats -> dmsetup
lrwxrwxrwx   1 root     root           20  Dec 16 01:49 usr/sbin/dropbear -> ../bin/dropbearmulti
lrwxrwxrwx   1 root     root           11  Dec 16 01:49 usr/sbin/era_check -> pdata_tools
lrwxrwxrwx   1 root     root           11  Dec 16 01:49 usr/sbin/era_dump -> pdata_tools
lrwxrwxrwx   1 root     root           11  Dec 16 01:49 usr/sbin/era_invalidate -> pdata_tools
lrwxrwxrwx   1 root     root           11  Dec 16 01:49 usr/sbin/era_restore -> pdata_tools
-rwxr-xr-x   1 root     root      2905416  Dec 16 01:49 usr/sbin/lvm
-rwxr-xr-x   1 root     root      3061192  Dec 16 01:49 usr/sbin/pdata_tools
-rwxr-xr-x   1 root     root          609  Dec 16 01:49 usr/sbin/resume-boot
lrwxrwxrwx   1 root     root           11  Dec 16 01:49 usr/sbin/thin_check -> pdata_tools
lrwxrwxrwx   1 root     root           11  Dec 16 01:49 usr/sbin/thin_delta -> pdata_tools
lrwxrwxrwx   1 root     root           11  Dec 16 01:49 usr/sbin/thin_dump -> pdata_tools
lrwxrwxrwx   1 root     root           11  Dec 16 01:49 usr/sbin/thin_ls -> pdata_tools
lrwxrwxrwx   1 root     root           11  Dec 16 01:49 usr/sbin/thin_metadata_size -> pdata_tools
lrwxrwxrwx   1 root     root           11  Dec 16 01:49 usr/sbin/thin_repair -> pdata_tools
lrwxrwxrwx   1 root     root           11  Dec 16 01:49 usr/sbin/thin_restore -> pdata_tools
lrwxrwxrwx   1 root     root           11  Dec 16 01:49 usr/sbin/thin_rmap -> pdata_tools
lrwxrwxrwx   1 root     root           11  Dec 16 01:49 usr/sbin/thin_trim -> pdata_tools
-rwxr-xr-x   1 root     root         3076  Dec 16 01:49 usr/sbin/unlock-luks
drwxr-xr-x   3 root     root            0  Dec 16 01:49 usr/share
drwxr-xr-x   2 root     root            0  Dec 16 01:49 usr/share/udhcpc
-rwxr-xr-x   1 root     root         1098  Dec 16 01:49 usr/share/udhcpc/default.script
drwxr-xr-x   3 root     root            0  Dec 16 01:49 var
drwxr-xr-x   2 root     root            0  Dec 16 01:49 var/log
-rw-r--r--   1 root     root            0  Dec 16 01:49 var/log/lastlog
-rw-r--r--   1 root     root            0  Dec 16 01:49 var/log/wtmp
lrwxrwxrwx   1 root     root            6  Dec 16 01:49 var/run -> ../run
========================================================================

The output above shows the e1000.ko file for an Intel NIC, the dropbear executable (usr/bin/dropbearmulti), and the cryptsetup (sbin/cryptsetup) executable have been embedded into the initramfs file.

Manual extraction

To extract a generated initramfs to inspect its content:

root # mkdir /tmp/initramfs

root # cd /tmp/initramfs

root # xzcat kernel-genkernel-x86_64-4.14.65-gentoo | cpio -idmv

root # ls -l sbin/cryptsetup

-rwxr-xr-x 1 root root 67568 28 d’oct 18:55 sbin/cryptsetup

附注
Manual extraction will be difficult if CPU microcode updates have been embedded into the initramfs.

Microcode loading

For microcode (ucode) updates, kernel must support (early-)microcode loading and microcode updates must be present early at boot. See Microcode article for more details.

Microcode loading support in kernel

By default, genkernel will enable microcode loading support in kernel for both, AMD and Intel processors. This behavior can be controlled through MICROCODE option in /etc/genkernel.conf or by using the --microcode=(no|all|amd|intel) command-line parameter during invocation.

Embedding microcode updates into initramfs

To embed microcode (ucode) updates into initramfs, MICROCODE_INITRAMFS must be enabled in /etc/genkernel.conf or command-line parameter --microcode-initramfs must be passed at invocation. This will cause genkernel to prepend microcode(s) for selected processor (see --microcode option above) to initramfs in case sys-firmware/intel-microcode with the split-ucode USE flag for Intel processors and/or sys-kernel/linux-firmware for AMD processors is installed.

附注
The technique of embedding microcode updates into the initramfs has been deprecated for modern systems in favor of using bootloaders (like sys-boot/grub) which are capable of loading multiple initramfs files. When using GRUB, or another modern bootloader, it is recommended to install sys-firmware/intel-microcode for Intel and sys-kernel/linux-firmware for AMD processors, both require the initramfs USE flag to be enabled. Let the bootloader load /boot/amd-uc.img and/or /boot/intel-uc.img in addition to genkernel's initramfs. This will enable updating of the CPU microcode independently of kernel/initramfs updates.

Firmware loading

Specific firmware files can be added to genkernel's automatically generated initramfs when listed, with relative paths, in the variable FIRMWARE_FILES in /etc/genkernel.conf. When sys-kernel/genkernel is installed with USE="firmware" it will prefer firmware files from /lib/firmware.

文件 /etc/genkernel.confIncluding firmware in the initramfs

# Add firmware(s) to initramfs
FIRMWARE="yes"
 
# Specify directory to pull from
FIRMWARE_DIR="/lib/firmware"
 
# Specify a comma-separated list of firmware files or directories to include,
# relative to FIRMWARE_DIR.  If empty or unset, the full contents of 
# FIRMWARE_DIR will be included (if FIRMWARE option above is set to YES).
FIRMWARE_FILES="<comma-separated list of firmware files here>"

In case sys-kernel/gentoo-sources is installed with USE="experimental" and the kernel is configured with CONFIG_GENTOO_PRINT_FIRMWARE_INFO=y, the following command gets a comma-separated list of all currently loaded firmware files for the use in the FIRMWARE_FILES variable from /etc/genkernel.conf as illustrated above (the output is just an example):

root #dmesg -t | grep '^Loading firmware*' | sed 's/^Loading\sfirmware:\s//' | echo $(cat) | tr ' ' ','

amdgpu/green_sardine_sdma.bin,amdgpu/green_sardine_asd.bin,amdgpu/green_sardine_ta.bin,amdgpu/green_sardine_pfp.bin,amdgpu/green_sardine_me.bin,amdgpu/green_sardine_ce.bin,amdgpu/green_sardine_rlc.bin,amdgpu/green_sardine_mec.bin,amdgpu/green_sardine_dmcub.bin,amdgpu/green_sardine_vcn.bin,regulatory.db,regulatory.db.p7s,rtw89/rtw8852a_fw.bin,rtl_bt/rtl8852au_fw.bin,rtl_bt/rtl8852au_config.bin,rtl_nic/rtl8168h-2.fw

It is also possible to incorporate the firmware into the kernel image directly, but be aware that CONFIG_EXTRA_FIRMWARE in the kernel configuration file .config (normally found in /usr/src/linux) requires a space-separated list (output example):

root #dmesg -t | grep '^Loading firmware*' | sed 's/^Loading\sfirmware:\s//' | echo $(cat)

amdgpu/green_sardine_sdma.bin amdgpu/green_sardine_asd.bin amdgpu/green_sardine_ta.bin amdgpu/green_sardine_pfp.bin amdgpu/green_sardine_me.bin amdgpu/green_sardine_ce.bin amdgpu/green_sardine_rlc.bin amdgpu/green_sardine_mec.bin amdgpu/green_sardine_dmcub.bin amdgpu/green_sardine_vcn.bin regulatory.db regulatory.db.p7s rtw89/rtw8852a_fw.bin rtl_bt/rtl8852au_fw.bin rtl_bt/rtl8852au_config.bin rtl_nic/rtl8168h-2.fw

附注
Such a list will only be complete if the drivers successfully load all the required firmware(s): In case a driver requires more than one firmware file but fails loading the first one, only this will be listed and thereby other required firmware filenames will be missing. A recommended procedure to find all required firmware files is to compile the respective drivers as modules first, M in the kernel configuration, and to notthe modules in initramfs. The modules will be loaded after switching to the real / (root) directory, where all firmware files will be available from sys-kernel/linux-firmware (and others) under /lib/firmware. When a system boots successfully with this method, running the above command will gather a complete list of the required firmware files. The files can be included in the initramfs (or the kernel itself), allowing for the drivers to be compiled directly into the kernel, * in the kernel configuration, or to include the drivers as kernel modules in the initramfs as well. In both cases loading the modules will be earlier and it will be successful with the availability of the firmware files in the initramfs, which must be loaded alongside the kernel e.g. using GRUB.

Remote rescue shell

genkernel can embed the net-misc/dropbear SSH daemon into the initramfs which will allow fixing certain things on boot remotely when initramfs is at least able to load. The most common used feature will be remote unlock capability for LUKS-encrypted root or swap devices or ZFS volumes.

Pre-requirement for SSH daemon support in initramfs

A authorized_keys file must exist before genkernel will be invoked. By default, genkernel will look for /etc/dropbear/authorized_keys. Command-line argument --ssh-authorized-keys-file=/path/to/custom/authorized_keys or genkernel configuration option SSH_AUTHORIZED_KEYS_FILE can be used to alter default value.

提示
Create /etc/dropbear/authorized_keys as a symlink to /root/.ssh/authorized_keys for example to keep root access and remote rescue shell access in sync!

Adding SSH support to initramfs

To embed SSH daemon into genkernel's initramfs, run genkernel with --ssh command-line argument or set SSH="yes" in genkernel configuration file. Needless to mention that this feature will require working network at boot. The following example will just (re-)build initramfs with SSH daemon embedded:

root #genkernel --ssh initramfs

* Gentoo Linux Genkernel; Version 4.0.1
* Using genkernel configuration from '/etc/genkernel.conf' ...
* Running with options: --ssh initramfs
</div>

<div lang="en" dir="ltr" class="mw-content-ltr">
* Working with Linux kernel 5.3.14-gentoo-r1-x86_64 for x86_64
* Using kernel config file '/etc/kernels/kernel-config-5.3.14-gentoo-r1-x86_64' ...
</div>

<div lang="en" dir="ltr" class="mw-content-ltr">
* initramfs: >> Initializing ...
*         >> Appending devices cpio data ...
*         >> Appending base_layout cpio data ...
*         >> Appending auxilary cpio data ...
*         >> Appending blkid cpio data ...
*         >> Appending busybox cpio data ...
*         >> Appending dropbear cpio data ...
=================================================================
This initramfs' sshd will use the following host key(s):
256 MD5:a5:13:09:90:5b:f6:a1:95:49:9f:87:d9:fa:e5:d8:02 (ECDSA)
256 SHA256:5dxNGEOwH9hvX4+sV4WtzRV/9m8/hrhgnNtTplZf5x8 (ECDSA)
2048 MD5:1d:e6:cc:ce:c8:96:a0:73:3e:4c:2a:56:ce:b9:10:26 (RSA)
2048 SHA256:V4WrMKhfVSxSeW3XIbW8dSaAmXiwN6jiMA/geNKLcqA (RSA)
=================================================================
*         >> Appending modprobed cpio data ...
*         >> Appending modules cpio data ...
*         >> Appending linker cpio data ...
*         >> Deduping cpio ...
*         >> Pre-generating initramfs' /etc/ld.so.cache ...
*         >> Compressing cpio data (.xz) ...
*
* You will find the initramfs in '/boot/initramfs-5.3.14-gentoo-r1-x86_64.img'.
</div>

<div lang="en" dir="ltr" class="mw-content-ltr">
* WARNING... WARNING... WARNING...
* Additional kernel parameters that *may* be required to boot properly:
* - Add "dosshd" to start SSH daemon in initramfs
</div>

<div lang="en" dir="ltr" class="mw-content-ltr">
* Do NOT report kernel bugs as genkernel bugs unless your bug
* is about the default genkernel configuration...
*
* Make sure you have the latest ~arch genkernel before reporting bugs.

附注
By default, genkernel will generate own, dedicated SSH host keys for any missing supported key algorithm for embedded SSH daemon. This will allow to differentiate between real system's SSH daemon and initramfs' SSH daemon. To use host's SSH host keys instead or generate new keys at runtime on each boot use --ssh-host-keys command-line option and see genkernel's man page for more details.

Enabling SSH daemon on boot

Just adding SSH daemon to initramfs is not enough. Because exposing any network service could be a security risk, this feature must be enabled via the kernel command-line argument dosshd! See Configure Network for how to configure network in genkernel.

Remote unlock

There are two possibilities to unlock LUKS-encrypted root and/or swap volume: A manual way, through an SSH connection, run a command and will get prompted for passphrase(s) or an automatic way where user passes passphrase through SSH as command.

附注
This will require a kernel/initramfs generated with --luks command-line argument and kernel must be booted with crypt_root (and/or crypt_swap) kernel command-line argument. ZFS user must generate kernel/initramfs with --zfs command-line argument and kernel must be booted with dozfs kernel command-line argument.

Manual unlock

Connect to the remote system through SSH and run the following commands:

user $ssh root@remote-system-running-genkernel-initramfs-with-dosshd

>> Welcome to Genkernel 4.0.1 (2019-12-16 22:34:14 UTC) remote rescue shell!
>> ...running Linux kernel 5.3.14-gentoo-r1-x86_64
</div>

<div lang="en" dir="ltr" class="mw-content-ltr">
>> The lockfile '/tmp/remote-rescueshell.lock' was created.
>> In order to resume boot process, run 'resume-boot'.
>> Be aware that it will kill your connection which means
>> you will no longer be able to work in this shell.
>> To remote unlock LUKS-encrypted root device, run 'unlock-luks root'.
</div>

<div lang="en" dir="ltr" class="mw-content-ltr">
remote rescueshell ~ # unlock-luks root
>> Detected real_root as a md device. Setting up the device node ...
Enter passphrase for /dev/md126:
>> LUKS device /dev/md126 opened
remote rescueshell ~ # resume-boot
>> Resuming boot process ...

附注
In this example, system was booted with just crypt_root= set in kernel command-line. In case system was booted with crypt_swap= there will be an additional prompt regarding how to unlock swap. ZFS user will get prompted to use unlock-zfs command instead.

Automatic unlock

It's basically the same like manual unlock just without the need to manually run resume-boot. In case user has both, encrypted root and swap volume, user must unlock swap volume first:

user $cat /path/to/secret.key/on/local/disk | ssh root@remote-system-running-genkernel-initramfs-with-dosshd post root

>> Detected real_root as a md device. Setting up the device node ...
>> LUKS device /dev/md126 opened
>> Resuming boot process ...

附注
Automatic unlock is not available for ZFS users.

网络启动

从一个安装 CD

The genkernel utility can build kernel and initrd images that provide support for network booting, or netbooting. With any luck, users should be able to netboot any recent computer into the environment provided by the Installation CD.

The magic lies in genkernel's linuxrc script: it will try to netmount the Installation CD using NFS. From there, the init scripts of the Installation CD can take over, as if the CD was present locally.

Building the kernel and initramfs with netboot support

要启用对网络引导的支持，请在配置内核时包括以下选项：

警告
对 genkernel 网络引导的支持是实验性的，可能包含漏洞。

First, the kernel image must include the drivers for the system's Network Interface Cards (NIC). Normally, drivers for such devices will be compiled as modules. However, it is essential (for netbooting) that such drivers are compiled directly into the kernel image and not as modules.

内核 Configuring a 3.x.x series kernel to support various NIC drivers

Device Drivers --->
   Networking Support --->
      Ethernet (10 or 100Mbit)  --->
         [*] Ethernet (10 or 100Mbit)
         <*>   The driver(s) for each network card

附注
一定要选择 <*> 而不是 <M>。

Secondly, it is suggested that IP: kernel level autoconfiguration is enabled as well as IP: DHCP support options. This avoids an unnecessary layer of complexity since the IP address and the NFS path to the Installation CD can be configured on a DHCP server. Of course, this means the kernel command line will remain constant for any machine — which is very important for etherbooting.

内核 Configuring a 3.x.x series kernel to support DHCP

Device Drivers --->
   Networking Support --->
      Networking options
         [*] TCP/IP networking--->
         [*]   IP: kernel level autoconfiguration
         [*]     IP: DHCP support

Tells the kernel to send a DHCP request at bootup.

Additionally, enable SquashFS because most modern Gentoo Installation CDs require it. Support for SquashFS is not included with the generic kernel source tree. To enable SquashFS, apply the necessary patches to the generic kernel source or install gentoo-sources.

内核 配置内核以支持 SquashFS

File systems--->
   Miscellaneous filesystems --->
      [*] SquashFS 2.X - Squashed file system support

Once the compilation process is completed, create a compressed tarball (tar.gz) that contains the kernel's modules. This step is only necessary if the kernel version does not match the kernel image version on the Installation CD.

要创建包含所有模块的存档：

root #cd /

root #tar -cf /tmp/modules-X.Y.Z.tar.gz /lib/modules/X.Y.Z/

根据网络引导机制，需要遵循以下步骤之一：

要创建以太网引导映像：

root #emerge --ask net-misc/mknbi

root #cd /boot

root #mkelf-linux -params="root=/dev/ram0 init=/linuxrc ip=dhcp" kernel... initrd... > etherboot.img

要创建 OpenBoot/SPARC64 TFTP 映像：

root #emerge --ask sys-apps/sparc-utils

root #cd /boot

root #elftoaout kernel... -o kernel.aout

root #piggyback64 kernel.aout System.map-... initrd-...

root #mv kernel.aout openboot.img

openboot.img 文件是启动映像。

Finally, copy this kernel to the TFTP server. The details are architecture-dependent and are beyond the scope of this guide. Please refer to the documentation for the specific platform of interest.

NFS 设置

To setup a NFS share that contains the Installation CD, use the loop device to mount the ISO image and then copy the contents of the CD into the NFS share. As a nice extra, genkernel's initrd scripts will extract all tar.gz files located in the /nfs/livecd/add/ directory. All that needs to be done here is copy the modules-X.Y.Z.tar.gz archive to the /nfs/livecd/add/ directory.

The following assumes that /nfs/livecd is an exported NFS share:

root #mount /tmp/gentoo-livecd.iso /mnt/cdrom -o loop

root #cp -p /mnt/cdrom /nfs/livecd

root #umount /mnt/cdrom

现在将 modules.tar.gz 文件复制到 /add 中：

root #mkdir /nfs/livecd/add

root #cp /tmp/modules-X.Y.Z.tar.gz /nfs/livecd/add

DHCP 设置

The netboot images will ask the DHCP server on the network for an IP as well as a root-path option. Both can be specified per host using a MAC address to identify machines:

文件 /etc/dhcpd.confSample client dhcpd.conf setup

# Here, 192.168.1.2 is the NFS server while 192.168.1.10 will be the IP address of the netbooted machine
host netbootableMachine {
         hardware ethernet 11:22:33:44:55:66;
         fixed-address 192.168.1.10;
         option root-path "192.168.1.2:/nfs/livecd";
}

网络引导说明

Netbooting itself is again very platform-specific. The important part is to specify the ip=dhcp and init=/linuxrc parameters on the kernel command line, as this will bring up the network interface and tell the initrd scripts to mount the Installation CD via NFS. Here are some platform-specific tips.

For etherboot, insert the etherboot disk into the drive and reboot. The kernel command line was specified when the image was constructed.

With Sparc64, press Stop+A at the boot prompt and then enter:

okboot net ip=dhcp init=/linuxrc

For PXE, setup pxelinux (part of syslinux), then create a pxelinux.cfg/default along the lines of:

文件 pxelinux.cfg/defaultDefault entry

DEFAULT gentoo
TIMEOUT 40
PROMPT 1
  
LABEL gentoo
    KERNEL kernel-X.Y.Z
    APPEND initrd=initrd-X.Y.Z root=/dev/ram0 init=/linuxrc ip=dhcp

启动 genkernel initramfs

介绍

If an initramfs is installed with genkernel, then take a look at the various boot options that can (or should) be defined in the bootloader configuration. The most common ones are added to this guide.

= 加载 LVM 或软件型 RAID

If the system uses LVM or software-RAID, the initramfs has to be built using the --lvm and --mdadm options. Do not forget to enable support during boot as well. This can be done using the dolvm and domdadm options.

文件 /boot/grub/grub.confEnabling LVM and/or MDADM support

# Example for GRUB 1.x
title Gentoo Linux
root (hd0,0)
kernel /vmlinuz root=/dev/md3 dolvm domdadm
initrd /initramfs-genkernel-x86_64-3.4.3

在单用户模式下启动

If for some reason boot-up fails, rescuing the system by booting in the single-user mode is still possible. This will only load the really necessary services and then drop the user to a rescue (root) shell.

文件 /boot/grub/grub.confBooting in single-user mode

# Example for GRUB 1.x
title Gentoo Linux
root (hd0,0)
kernel /vmlinuz root=/dev/md3 init_opts=S
initrd /initramfs-genkernel-x86_64-3.4.3

Cross-compile support

To build kernel and/or initramfs for a different platform as genkernel is being executed on, kernel/initramfs must be cross-compiled.

root #genkernel --mdadm --no-install --cross-compile=aarch64-linux-gnu all

The above command causes genkernel to create a kernel supporting MD raid and embed mdadm into initramfs (--mdadm), both kernel and initramfs will have to be manually installed (--no-install). The kernel and programs embedded into initramfs will run on arm64 (--cross-compile=aarch64-linux-gnu).

--cross-compile=<target triplet>

Target triple (i.e. aarch64-linux-gnu) to build for. Only needed when the system running genkernel has a different architecture like the system which should boot the created kernel/initramfs.

提示
The recommended way to create a cross-compile environment is using sys-devel/crossdev. See the how to create a cross-compile environment article for more details.

Initramfs kernel command-line parameters

附注
The following parameter list is just an excerpt. Always check the version relevant man genkernel.

root=<...>

Specifies the device node of the root filesystem to mount. I.e. root=/dev/sda3, root=UUID=a1e5968c-bd1b-41ee-bf08-2d0ed376fa83.

cdroot

This attempts to load livecd.squashfs and is used for loading live media.

crypt_root=<...>

This specifies the device encrypted by LUKS, which contains the root filesystem to mount. Supports same syntax like root kernel command-line parameter from above.

附注
Will require that at least initramfs was built with --luks option set.

crypt_swap=<...>

This specifies the swap device encrypted by LUKS. For more details please see crypt_root kernel command-line parameter from above.

root_trim=(yes|no)

Enables TRIM support for a LUKS-based root device.

附注
Will require that at least initramfs was built with --luks option set and is only useful for flash-based volumes.

ip=<dhcp,addr/cidr>

Normally used to tell the kernel that it should start a network interface which can be specified using gk.net.iface kernel parameter. By default, dhcp will be used. A specific IP address can be set using addr/CIDR notation, i.e. 1.2.3.4/24.

gk.net.dhcp.retries=<...>

Sends up to 3 DHCP discovery requests by default.

gk.net.iface=<interface,macaddr>

Use the interface named eth0 by default. Use this kernel parameter to specify another interface.
A MAC address (00:00:00:00:00:00 format) can be specified instead of an interface name.

gk.net.gw=<...>

Optional gateway. If ip is set to dhcp, this kernel parameter will be ignored.

gk.net.routes=<...>

Optional additional routes. If ip is set to dhcp, this kernel parameter will be ignored.

gk.net.timeout.dad=<...>

Wait up to 10 seconds by default for IPv6's DAD to complete. At the moment, only wait for DAD while bringing down an interface to prevent a race condition.

gk.net.timeout.deconfiguration=<...>

Wait up to 10 seconds by default while bringing down an interface to prevent a race condition.

gk.net.timeout.dhcp=<...>

Wait up to 10 seconds by default for a DHCP server reply.

gk.net.timeout.interface=<...>

Wait up to 10 seconds by default for interface to show up.

gk.prompt.timeout=<...>

By default a prompt within genkernel initramfs like shown when set root could not be found will never timeout. Use this option to set a timeout.

附注
When dosshd is used, gk.prompt.timeout will be set to 30 seconds when not set. This will allow remote user to provide answer through GK_PROMPT_FILE which is set to /tmp/current_prompt by default.

dosshd

Will bring up an interface and start a SSH daemon within initramfs allowing to remotely unlock encrypted devices or just for debugging purpose. See ip option for how to configure network.

附注
Will require that initramfs was built at least with --ssh option set.

gk.sshd.port=<...>

By default, sshd will listen on port 22.

gk.sshd.wait=<...>

Wait X seconds after setting up sshd. Useful for login (and thus pause boot process) before booting real system.

dolvm

Activate LVM volumes on bootup.

附注
Will require that initramfs was built at least with --lvm option set.

lvmraid=<...>

Specify RAID devices to set up before the activation of LVM volumes. Implies option dolvm from above.

domdadm (Deprecated in Genkernel 4.2.0, udev rules now control MD assembly)

Scan for RAID arrays on bootup.

附注
Will require that initramfs was built at least with --mdadm option set.

dozfs[=cache,force]

Scan for bootable ZFS pools on bootup. Optionally use cachefile or force import if necessary or perform both actions.

附注
Will require that initramfs was built at least with --zfs option set.

gk.log.disabled=<...>

By default, any shown message and external command calls will be logged to /tmp/init.log in initramfs. Disables logging.

gk.log.keep=<...>

When set to a boolean value, genkernel will preserve /tmp/init.log, see above, and copy file to /genkernel-boot.log on root device (see root or real_root kernel command-line parameter above). Customize to a file like /root/my-genkernel-boot.log to copy the log.

附注
The default file /genkernel-boot.log on root was chosen because genkernel's initramfs will only mount root filesystem by default. To store the log file at /var/log/genkernel-boot.log, the mount point must be accessible (see /etc/initramfs.mounts).

gk.hw.load-all=<...>

By default, genkernel loads various module groups (nvme, sata, scsi, pata, usb...) until block device specified in root parameter (see above) becomes available. This boolean option can be used to force loading of all module groups regardless whether root device is already available when set to yes.

故障排除

Can genkernel be used for systemd-based systems?

Yes.

Genkernel? Genkernel-next? Dracut?

附注
sys-kernel/genkernel-next has been removed from the Gentoo repository as of August, 20, 2020

Gentoo is about choices. sys-kernel/genkernel-next was created as fork of sys-kernel/genkernel when genkernel development was stuck, booting a systemd-based system using kernel/initramfs created with sys-kernel/genkernel was a problem (systemd support in sys-kernel/genkernel is fixed for quite some time) and some developers wanted support for things like sys-boot/plymouth which requires sys-fs/udev which was not and still is not compatible with genkernel's main idea (see "Note" right at the beginning of this article). While the name suggests that sys-kernel/genkernel-next is or will be the successor of sys-kernel/genkernel, it is just misleading: Since 2013 there are some requests to merge genkernel-next back into genkernel but the process became stuck. Since the release of sys-kernel/genkernel-4 which changed a lot and the fact that there was no progress in sys-kernel/genkernel-next development since 2018, it's now very unlikely that genkernel-next will ever merge back into genkernel.

sys-kernel/dracut in comparison to sys-kernel/genkernel is just a generic tool for creating an initramfs. It does not create a kernel like genkernel does. I.e. while both, genkernel and dracut supports booting from LUKS-encrypted root volume, only genkernel will ensure that kernel will have all required options set. It's also worthwhile to mention that genkernel will compile most packages (LVM, cryptsetup, mdadm, sshd...) used in initramfs on its own whereas dracut will copy binaries from host system which can be a problem for some setups. Thus, genkernel supports kernel/initramfs creation for another system (cross-compile) unlike dracut or genkernel-next.

Can a separate kernel/initramfs be created for tests?

root #genkernel --kernel-config=/proc/config.gz --kernel-append-localversion=-test42 --menuconfig all

The above command causes genkernel to build a new kernel and initramfs (all) based on config from current running kernel (--kernel-config=/proc/config.gz), invoke menuconfig (--menuconfig) allowing user to adjust configuration and will append -test42 to kernel's LOCALVERSION variable (--kernel-append-localversion=-test42) which will affect naming of kernel image, modules dir and initramfs by default.

How can external modules (such as xtables-addons, nvidia-drivers...) be rebuilt for a new kernel?

By default, genkernel will call emerge @module-rebuild when building a kernel to ensure that out-of-tree modules installed through the package manager are still present in new/rebuilt kernel. This feature can be toggled via --[no-]module-rebuild command-line argument or MODULEREBUILD in /etc/genkernel.conf.

How can additional commands be run after building the kernel?

Genkernel provides a callback for that (before version 4, callback was used to rebuild external modules). See CMD_CALLBACK in /etc/genkernel.conf for more details.

How can ccache or distcc be used with genkernel?

Set up ccache or distcc the normal way like for sys-apps/portage. Set --kernel-cc command-line parameter or adjust KERNEL_CC in /etc/genkernel.conf for the desired tool to use. Do the same for UTILS_CC (--utils-cc) and UTILS_CXX (--utils-cxx).

ERROR: compile_kernel(): compile_generic() failed to compile the "bzImage" target!

Check /var/log/genkernel.log first. In most cases, a root cause will appear like:

文件 /var/log/genkernel.log

[...]
  AR      drivers/usb/built-in.a
  AR      drivers/built-in.a
  GEN     .version
  CHK     include/generated/compile.h
  AR      built-in.a
  LD      vmlinux.o
  MODPOST vmlinux.o
ld: .tmp_vmlinux1: final close failed: No space left on device
make: *** [Makefile:1032: vmlinux] Error 1
 
* ERROR: compile_kernel(): compile_generic() failed to compile the "bzImage" target!
* Please consult '/var/log/genkernel.log' for more information and any
* errors that were reported above.
*
* Report any genkernel bugs to bugs.gentoo.org and
* assign your bug to genkernel@gentoo.org. Please include
* as much information as you can in your bug report; attaching
* '/var/log/genkernel.log' so that your issue can be dealt with effectively.
*
* Please do *not* report kernel compilation failures as genkernel bugs!
*
 
* mount: >> Boot partition state on '/boot' was not changed; Skipping restore boot partition state ...
>>> Ended on: 2019-12-16 02:30:19 (after 0 days 0 hours 07 minutes 49 seconds)
</pre>

In other words: The system has run out of disk space (No space left on device) during compilation.

To guard against problems like this set CHECK_FREE_DISK_SPACE_BOOTDIR=50 and CHECK_FREE_DISK_SPACE_KERNELOUTPUTDIR=4000 in /etc/genkernel.conf in which case genkernel would fail early with a message like

root #genkernel --kernel-config=/proc/config.gz all

* Gentoo Linux Genkernel; Version 4.0.1
* Using genkernel configuration from '/etc/genkernel.conf' ...
* Running with options: --kernel-config=/proc/config.gz all
 
* Working with Linux kernel 4.19.89-gentoo-x86_64 for x86_64
* Using kernel config file '/proc/config.gz' ...
*
* Note: The version above is subject to change (depends on config and status of kernel sources).
* ERROR: 4000 MB free disk space is required in '/usr/src/linux' but only 1026 MB is available!
[...]

Is the order of kernel command-line arguments important?

No.

Required kernel option 'CONFIG_MICROCODE_INTEL' or 'CONFIG_MICROCODE_AMD' which genkernel tried to set is missing!

Kernel v6.6 permanently applied the kernel config parameters (see this commit). This was fixed in version 4.3.10 of sys-kernel/genkernel.

Help! Something isn't working!

To report a problem, please always provide /var/log/genkernel.log (sometimes it maybe necessary to compress that file before sharing or attaching to bugs) which will help developers a lot. Even if the command is run with --loglevel=1 (default), the logfile will always contain complete output (no need to re-run with logging turned on) which will help developers to understand, reproduce and maybe fix a bug.

另请参阅

• Dracut — an initramfs infrastructure and aims to have as little as possible hard-coded into the initramfs.
• Kernel — 操作系统的核心。
• Kernel/Configuration — 描述了 Linux 内核的手动配置和设置。
• Project:Distribution Kernel — aims to maintain sys-kernel/*-kernel packages.

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This page is based on a document formerly found on our main website gentoo.org.
The following people contributed to the original document: Tim Yamin, Jimi Ayodele, Thomas Seiler, Joshua Saddler (nightmorph), Sebastian Pipping (sping) , José Fournier (jaaf)
They are listed here because wiki history does not allow for any external attribution. If you edit the wiki article, please do not add yourself here; your contributions are recorded on each article's associated history page.