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doc: Move “System Troubleshooting Tips” below.
So far this section would appear before “Getting Started”. This moves it right after “System Configuration”. * doc/guix.texi (System Troubleshooting Tips): Move after “System Configuration”.
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Ludovic Courtès
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1 changed files with 123 additions and 122 deletions
245
doc/guix.texi
245
doc/guix.texi
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@ -185,7 +185,6 @@ Weblate} (@pxref{Translating Guix}).
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* Introduction:: What is Guix about?
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* Installation:: Installing Guix.
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* System Installation:: Installing the whole operating system.
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* System Troubleshooting Tips:: When things don't go as planned.
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* Getting Started:: Your first steps.
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* Package Management:: Package installation, upgrade, etc.
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* Channels:: Customizing the package collection.
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@ -194,6 +193,7 @@ Weblate} (@pxref{Translating Guix}).
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* Utilities:: Package management commands.
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* Foreign Architectures:: Build for foreign architectures.
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* System Configuration:: Configuring the operating system.
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* System Troubleshooting Tips:: When things don't go as planned.
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* Home Configuration:: Configuring the home environment.
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* Documentation:: Browsing software user manuals.
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* Platforms:: Defining platforms.
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@ -251,10 +251,6 @@ Manual Installation
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* Keyboard Layout and Networking and Partitioning:: Initial setup.
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* Proceeding with the Installation:: Installing.
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System Troubleshooting Tips
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* Chrooting into an existing system::
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Package Management
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* Features:: How Guix will make your life brighter.
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@ -427,6 +423,10 @@ Defining Services
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* Shepherd Services:: A particular type of service.
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* Complex Configurations:: Defining bindings for complex configurations.
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System Troubleshooting Tips
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* Chrooting into an existing system::
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Home Configuration
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* Declaring the Home Environment:: Customizing your Home.
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@ -2978,123 +2978,6 @@ guix system image --system=armhf-linux -e '((@@ (gnu system install) os-with-u-b
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@code{A20-OLinuXino-Lime2} is the name of the board. If you specify an invalid
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board, a list of possible boards will be printed.
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@c *********************************************************************
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@cindex troubleshooting, guix system
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@cindex guix system troubleshooting
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@node System Troubleshooting Tips
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@chapter System Troubleshooting Tips
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Guix System allows rebooting into a previous generation should the last
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one be malfunctioning, which makes it quite robust against being broken
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irreversibly. This feature depends on GRUB being correctly functioning
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though, which means that if for whatever reasons your GRUB installation
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becomes corrupted during a system reconfiguration, you may not be able
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to easily boot into a previous generation. A technique that can be used
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in this case is to @i{chroot} into your broken system and reconfigure it
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from there. Such technique is explained below.
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@cindex chroot, guix system
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@cindex chrooting, guix system
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@cindex repairing GRUB, via chroot
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@menu
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* Chrooting into an existing system::
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@end menu
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@node Chrooting into an existing system
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@section Chrooting into an existing system
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This section details how to @i{chroot} to an already installed Guix
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System with the aim of reconfiguring it, for example to fix a broken
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GRUB installation. The process is similar to how it would be done on
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other GNU/Linux systems, but there are some Guix System particularities
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such as the daemon and profiles that make it worthy of explaining here.
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@enumerate
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@item
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Obtain a bootable image of Guix System. It is recommended the latest
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development snapshot so the kernel and the tools used are at least as as
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new as those of your installed system; it can be retrieved from the
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@url{https://ci.guix.gnu.org/search/latest/ISO-9660?query=spec:images+status:success+system:x86_64-linux+image.iso,
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https://ci.guix.gnu.org} URL. Follow the @pxref{USB Stick and DVD
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Installation} section for copying it to a bootable media.
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@item
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Boot the image, and proceed with the graphical text-based installer
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until your network is configured. Alternatively, you could configure
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the network manually by following the
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@ref{manual-installation-networking} section. If you get the error
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@samp{RTNETLINK answers: Operation not possible due to RF-kill}, try
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@samp{rfkill list} followed by @samp{rfkill unblock 0}, where @samp{0}
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is your device identifier (ID).
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@item
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Switch to a virtual console (tty) if you haven't already by pressing
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simultaneously the @kbd{Control + Alt + F4} keys. Mount your file
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system at @file{/mnt}. Assuming your root partition is
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@file{/dev/sda2}, you would do:
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@example sh
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mount /dev/sda2 /mnt
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@end example
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@item
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Mount special block devices and Linux-specific directories:
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@example sh
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mount --rbind /proc /mnt/proc
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mount --rbind /sys /mnt/sys
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mount --rbind /dev /mnt/dev
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@end example
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If your system is EFI-based, you must also mount the ESP partition.
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Assuming it is @file{/dev/sda1}, you can do so with:
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@example sh
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mount /dev/sda1 /mnt/boot/efi
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@end example
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@item
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Enter your system via chroot:
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@example sh
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chroot /mnt /bin/sh
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@end example
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@item
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Source the system profile as well as your @var{user} profile to setup
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the environment, where @var{user} is the user name used for the Guix
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System you are attempting to repair:
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@example sh
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source /var/guix/profiles/system/profile/etc/profile
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source /home/@var{user}/.guix-profile/etc/profile
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@end example
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To ensure you are working with the Guix revision you normally would as
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your normal user, also source your current Guix profile:
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@example sh
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source /home/@var{user}/.config/guix/current/etc/profile
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@end example
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@item
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Start a minimal @command{guix-daemon} in the background:
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@example sh
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guix-daemon --build-users-group=guixbuild --disable-chroot &
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@end example
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@item
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Edit your Guix System configuration if needed, then reconfigure with:
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@example sh
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guix system reconfigure your-config.scm
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@end example
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@item
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Finally, you should be good to reboot the system to test your fix.
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@end enumerate
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@c *********************************************************************
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@node Getting Started
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@ -43113,6 +42996,124 @@ is-married = true
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@end example
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@c *********************************************************************
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@cindex troubleshooting, Guix System
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@cindex guix system troubleshooting
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@node System Troubleshooting Tips
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@chapter System Troubleshooting Tips
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Guix System allows rebooting into a previous generation should the last
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one be malfunctioning, which makes it quite robust against being broken
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irreversibly. This feature depends on GRUB being correctly functioning
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though, which means that if for whatever reasons your GRUB installation
|
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becomes corrupted during a system reconfiguration, you may not be able
|
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to easily boot into a previous generation. A technique that can be used
|
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in this case is to @i{chroot} into your broken system and reconfigure it
|
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from there. Such technique is explained below.
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@cindex chroot, guix system
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@cindex chrooting, guix system
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@cindex repairing GRUB, via chroot
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@menu
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* Chrooting into an existing system::
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@end menu
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@node Chrooting into an existing system
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@section Chrooting into an existing system
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This section details how to @i{chroot} to an already installed Guix
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System with the aim of reconfiguring it, for example to fix a broken
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GRUB installation. The process is similar to how it would be done on
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other GNU/Linux systems, but there are some Guix System particularities
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such as the daemon and profiles that make it worthy of explaining here.
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@enumerate
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@item
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Obtain a bootable image of Guix System. It is recommended the latest
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development snapshot so the kernel and the tools used are at least as as
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new as those of your installed system; it can be retrieved from the
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@url{https://ci.guix.gnu.org/search/latest/ISO-9660?query=spec:images+status:success+system:x86_64-linux+image.iso,
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https://ci.guix.gnu.org} URL. Follow the @pxref{USB Stick and DVD
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Installation} section for copying it to a bootable media.
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@item
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Boot the image, and proceed with the graphical text-based installer
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until your network is configured. Alternatively, you could configure
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the network manually by following the
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@ref{manual-installation-networking} section. If you get the error
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@samp{RTNETLINK answers: Operation not possible due to RF-kill}, try
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@samp{rfkill list} followed by @samp{rfkill unblock 0}, where @samp{0}
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is your device identifier (ID).
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@item
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Switch to a virtual console (tty) if you haven't already by pressing
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simultaneously the @kbd{Control + Alt + F4} keys. Mount your file
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system at @file{/mnt}. Assuming your root partition is
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@file{/dev/sda2}, you would do:
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@example sh
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mount /dev/sda2 /mnt
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@end example
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@item
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Mount special block devices and Linux-specific directories:
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@example sh
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mount --rbind /proc /mnt/proc
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mount --rbind /sys /mnt/sys
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mount --rbind /dev /mnt/dev
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@end example
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If your system is EFI-based, you must also mount the ESP partition.
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Assuming it is @file{/dev/sda1}, you can do so with:
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@example sh
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mount /dev/sda1 /mnt/boot/efi
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@end example
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@item
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Enter your system via chroot:
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@example sh
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chroot /mnt /bin/sh
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@end example
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@item
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Source the system profile as well as your @var{user} profile to setup
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the environment, where @var{user} is the user name used for the Guix
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System you are attempting to repair:
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@example sh
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source /var/guix/profiles/system/profile/etc/profile
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source /home/@var{user}/.guix-profile/etc/profile
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@end example
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To ensure you are working with the Guix revision you normally would as
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your normal user, also source your current Guix profile:
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@example sh
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source /home/@var{user}/.config/guix/current/etc/profile
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@end example
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@item
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Start a minimal @command{guix-daemon} in the background:
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@example sh
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guix-daemon --build-users-group=guixbuild --disable-chroot &
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@end example
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@item
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Edit your Guix System configuration if needed, then reconfigure with:
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@example sh
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guix system reconfigure your-config.scm
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@end example
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@item
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Finally, you should be good to reboot the system to test your fix.
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@end enumerate
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@node Home Configuration
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@chapter Home Configuration
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@cindex home configuration
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