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nixos docs: format =)

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Graham Christensen
2018-05-01 19:57:09 -04:00
parent 77161de454
commit eca5c99bf8
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nixos/doc/manual/administration/rollback.xml
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@@ -3,46 +3,39 @@
xmlns:xi="http://www.w3.org/2001/XInclude"
version="5.0"
xml:id="sec-rollback">
<title>Rolling Back Configuration Changes</title>
<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:
<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>
<para>Second, you can switch to the previous configuration in a running
system:
<para>
Second, you can switch to the previous configuration in a running system:
<screen>
# nixos-rebuild switch --rollback</screen>
This is equivalent to running:
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:
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>
</para>
</section>