mirror of
https://github.com/ilyakooo0/nixpkgs.git
synced 2024-12-28 22:32:58 +03:00
48 lines
1.6 KiB
XML
48 lines
1.6 KiB
XML
<section xmlns="http://docbook.org/ns/docbook"
|
||
xmlns:xlink="http://www.w3.org/1999/xlink"
|
||
xmlns:xi="http://www.w3.org/2001/XInclude"
|
||
version="5.0"
|
||
xml:id="sec-rollback">
|
||
|
||
<title>Rolling Back Configuration Changes</title>
|
||
|
||
<para>After running <command>nixos-rebuild</command> to switch to a
|
||
new configuration, you may find that the new configuration doesn’t
|
||
work very well. In that case, there are several ways to return to a
|
||
previous configuration.</para>
|
||
|
||
<para>First, the GRUB boot manager allows you to boot into any
|
||
previous configuration that hasn’t been garbage-collected. These
|
||
configurations can be found under the GRUB submenu “NixOS - All
|
||
configurations”. This is especially useful if the new configuration
|
||
fails to boot. After the system has booted, you can make the selected
|
||
configuration the default for subsequent boots:
|
||
|
||
<screen>
|
||
$ /run/current-system/bin/switch-to-configuration boot</screen>
|
||
|
||
</para>
|
||
|
||
<para>Second, you can switch to the previous configuration in a running
|
||
system:
|
||
|
||
<screen>
|
||
$ nixos-rebuild switch --rollback</screen>
|
||
|
||
This is equivalent to running:
|
||
|
||
<screen>
|
||
$ /nix/var/nix/profiles/system-<replaceable>N</replaceable>-link/bin/switch-to-configuration switch</screen>
|
||
|
||
where <replaceable>N</replaceable> is the number of the NixOS system
|
||
configuration. To get a list of the available configurations, do:
|
||
|
||
<screen>
|
||
$ ls -l /nix/var/nix/profiles/system-*-link
|
||
<replaceable>...</replaceable>
|
||
lrwxrwxrwx 1 root root 78 Aug 12 13:54 /nix/var/nix/profiles/system-268-link -> /nix/store/202b...-nixos-13.07pre4932_5a676e4-4be1055
|
||
</screen>
|
||
|
||
</para>
|
||
|
||
</section> |