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Diffstat (limited to 'nixos/doc/manual/administration/rollback.xml')
-rw-r--r-- | nixos/doc/manual/administration/rollback.xml | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/nixos/doc/manual/administration/rollback.xml b/nixos/doc/manual/administration/rollback.xml new file mode 100644 index 000000000000..23a3ece7c070 --- /dev/null +++ b/nixos/doc/manual/administration/rollback.xml @@ -0,0 +1,48 @@ +<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> \ No newline at end of file |