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author | Bobby Rong <rjl931189261@126.com> | 2021-07-02 10:48:31 +0800 |
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committer | Bobby Rong <rjl931189261@126.com> | 2021-07-02 10:48:31 +0800 |
commit | 4df0b9903d391b7531e06ca859c46f261335bdc1 (patch) | |
tree | 21d65cbb4ee6739f2de19473e545d232e5364882 /nixos/doc/manual/administration/store-corruption.section.md | |
parent | 99493b61ea5dc657a3febc6291bc83802005ad89 (diff) | |
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nixos: nixos/doc/manual/administration/store-corruption.xml to CommonMark
Diffstat (limited to 'nixos/doc/manual/administration/store-corruption.section.md')
-rw-r--r-- | nixos/doc/manual/administration/store-corruption.section.md | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/nixos/doc/manual/administration/store-corruption.section.md b/nixos/doc/manual/administration/store-corruption.section.md new file mode 100644 index 00000000000..bd8a5772b37 --- /dev/null +++ b/nixos/doc/manual/administration/store-corruption.section.md @@ -0,0 +1,28 @@ +# Nix Store Corruption {#sec-nix-store-corruption} + +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 `sync` 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. + +If the corruption is in a path in the closure of the NixOS system +configuration, you can fix it by doing + +```ShellSession +# nixos-rebuild switch --repair +``` + +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. + +You can also scan the entire Nix store for corrupt paths: + +```ShellSession +# nix-store --verify --check-contents --repair +``` + +Any corrupt paths will be redownloaded if they're available in a binary +cache; otherwise, they cannot be repaired. |