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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/store-corruption.xml
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@@ -3,35 +3,34 @@
xmlns:xi="http://www.w3.org/2001/XInclude"
version="5.0"
xml:id="sec-nix-store-corruption">
<title>Nix Store Corruption</title>
<title>Nix Store Corruption</title>
<para>After a system crash, it’s possible for files in the Nix store
to become corrupted. (For instance, the Ext4 file system has the
tendency to replace un-synced files with zero bytes.) NixOS tries
hard to prevent this from happening: it performs a
<command>sync</command> before switching to a new configuration, and
Nix’s database is fully transactional. If corruption still occurs,
you may be able to fix it automatically.</para>
<para>If the corruption is in a path in the closure of the NixOS
system configuration, you can fix it by doing
<para>
After a system crash, it’s possible for files in the Nix store to become
corrupted. (For instance, the Ext4 file system has the tendency to replace
un-synced files with zero bytes.) NixOS tries hard to prevent this from
happening: it performs a <command>sync</command> before switching to a new
configuration, and Nix’s database is fully transactional. If corruption
still occurs, you may be able to fix it automatically.
</para>
<para>
If the corruption is in a path in the closure of the NixOS system
configuration, you can fix it by doing
<screen>
# nixos-rebuild switch --repair
</screen>
This will cause Nix to check every path in the closure, and if its
cryptographic hash differs from the hash recorded in Nix’s database, the
path is rebuilt or redownloaded.
</para>
This will cause Nix to check every path in the closure, and if its
cryptographic hash differs from the hash recorded in Nix’s database,
the path is rebuilt or redownloaded.</para>
<para>You can also scan the entire Nix store for corrupt paths:
<para>
You can also scan the entire Nix store for corrupt paths:
<screen>
# nix-store --verify --check-contents --repair
</screen>
Any corrupt paths will be redownloaded if they’re available in a
binary cache; otherwise, they cannot be repaired.</para>
Any corrupt paths will be redownloaded if they’re available in a binary
cache; otherwise, they cannot be repaired.
</para>
</section>