From 99493b61ea5dc657a3febc6291bc83802005ad89 Mon Sep 17 00:00:00 2001
From: Bobby Rong <rjl931189261@126.com>
Date: Fri, 2 Jul 2021 10:47:32 +0800
Subject: [PATCH] nixos: nixos/doc/manual/administration/rollback.xml to
 CommonMark

---
 .../manual/administration/rollback.section.md | 38 +++++++++++++++++
 nixos/doc/manual/administration/rollback.xml  | 41 ------------------
 .../manual/administration/troubleshooting.xml |  2 +-
 .../administration/rollback.section.xml       | 42 +++++++++++++++++++
 4 files changed, 81 insertions(+), 42 deletions(-)
 create mode 100644 nixos/doc/manual/administration/rollback.section.md
 delete mode 100644 nixos/doc/manual/administration/rollback.xml
 create mode 100644 nixos/doc/manual/from_md/administration/rollback.section.xml

diff --git a/nixos/doc/manual/administration/rollback.section.md b/nixos/doc/manual/administration/rollback.section.md
new file mode 100644
index 000000000000..290d685a2a18
--- /dev/null
+++ b/nixos/doc/manual/administration/rollback.section.md
@@ -0,0 +1,38 @@
+# Rolling Back Configuration Changes {#sec-rollback}
+
+After running `nixos-rebuild` 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.
+
+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:
+
+```ShellSession
+# /run/current-system/bin/switch-to-configuration boot
+```
+
+Second, you can switch to the previous configuration in a running
+system:
+
+```ShellSession
+# nixos-rebuild switch --rollback
+```
+
+This is equivalent to running:
+
+```ShellSession
+# /nix/var/nix/profiles/system-N-link/bin/switch-to-configuration switch
+```
+
+where `N` is the number of the NixOS system configuration. To get a
+list of the available configurations, do:
+
+```ShellSession
+$ ls -l /nix/var/nix/profiles/system-*-link
+...
+lrwxrwxrwx 1 root root 78 Aug 12 13:54 /nix/var/nix/profiles/system-268-link -> /nix/store/202b...-nixos-13.07pre4932_5a676e4-4be1055
+```
diff --git a/nixos/doc/manual/administration/rollback.xml b/nixos/doc/manual/administration/rollback.xml
deleted file mode 100644
index 80d79e1a53f1..000000000000
--- a/nixos/doc/manual/administration/rollback.xml
+++ /dev/null
@@ -1,41 +0,0 @@
-<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>
-<prompt># </prompt>/run/current-system/bin/switch-to-configuration boot</screen>
- </para>
-
- <para>
-  Second, you can switch to the previous configuration in a running system:
-<screen>
-<prompt># </prompt>nixos-rebuild switch --rollback</screen>
-  This is equivalent to running:
-<screen>
-<prompt># </prompt>/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>
-<prompt>$ </prompt>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>
diff --git a/nixos/doc/manual/administration/troubleshooting.xml b/nixos/doc/manual/administration/troubleshooting.xml
index a7d731922213..16cf4f00b26d 100644
--- a/nixos/doc/manual/administration/troubleshooting.xml
+++ b/nixos/doc/manual/administration/troubleshooting.xml
@@ -10,7 +10,7 @@
  </para>
  <xi:include href="../from_md/administration/boot-problems.section.xml" />
  <xi:include href="../from_md/administration/maintenance-mode.section.xml" />
- <xi:include href="rollback.xml" />
+ <xi:include href="../from_md/administration/rollback.section.xml" />
  <xi:include href="store-corruption.xml" />
  <xi:include href="network-problems.xml" />
 </chapter>
diff --git a/nixos/doc/manual/from_md/administration/rollback.section.xml b/nixos/doc/manual/from_md/administration/rollback.section.xml
new file mode 100644
index 000000000000..a8df053011c5
--- /dev/null
+++ b/nixos/doc/manual/from_md/administration/rollback.section.xml
@@ -0,0 +1,42 @@
+<section xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink" xml:id="sec-rollback">
+  <title>Rolling Back Configuration Changes</title>
+  <para>
+    After running <literal>nixos-rebuild</literal> 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 <quote>NixOS -
+    All configurations</quote>. 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>
+  <programlisting>
+# /run/current-system/bin/switch-to-configuration boot
+</programlisting>
+  <para>
+    Second, you can switch to the previous configuration in a running
+    system:
+  </para>
+  <programlisting>
+# nixos-rebuild switch --rollback
+</programlisting>
+  <para>
+    This is equivalent to running:
+  </para>
+  <programlisting>
+# /nix/var/nix/profiles/system-N-link/bin/switch-to-configuration switch
+</programlisting>
+  <para>
+    where <literal>N</literal> is the number of the NixOS system
+    configuration. To get a list of the available configurations, do:
+  </para>
+  <programlisting>
+$ ls -l /nix/var/nix/profiles/system-*-link
+...
+lrwxrwxrwx 1 root root 78 Aug 12 13:54 /nix/var/nix/profiles/system-268-link -&gt; /nix/store/202b...-nixos-13.07pre4932_5a676e4-4be1055
+</programlisting>
+</section>