forked from lix-project/lix
73 lines
2.2 KiB
Markdown
73 lines
2.2 KiB
Markdown
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# Name
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`nix-store --gc` - run garbage collection
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# Synopsis
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`nix-store` `--gc` [`--print-roots` | `--print-live` | `--print-dead`] [`--max-freed` *bytes*]
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# Description
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Without additional flags, the operation `--gc` performs a garbage
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collection on the Nix store. That is, all paths in the Nix store not
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reachable via file system references from a set of “roots”, are deleted.
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The following suboperations may be specified:
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- `--print-roots`\
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This operation prints on standard output the set of roots used by
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the garbage collector.
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- `--print-live`\
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This operation prints on standard output the set of “live” store
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paths, which are all the store paths reachable from the roots. Live
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paths should never be deleted, since that would break consistency —
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it would become possible that applications are installed that
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reference things that are no longer present in the store.
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- `--print-dead`\
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This operation prints out on standard output the set of “dead” store
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paths, which is just the opposite of the set of live paths: any path
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in the store that is not live (with respect to the roots) is dead.
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By default, all unreachable paths are deleted. The following options
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control what gets deleted and in what order:
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- `--max-freed` *bytes*\
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Keep deleting paths until at least *bytes* bytes have been deleted,
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then stop. The argument *bytes* can be followed by the
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multiplicative suffix `K`, `M`, `G` or `T`, denoting KiB, MiB, GiB
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or TiB units.
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The behaviour of the collector is also influenced by the
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`keep-outputs` and `keep-derivations` settings in the Nix
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configuration file.
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By default, the collector prints the total number of freed bytes when it
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finishes (or when it is interrupted). With `--print-dead`, it prints the
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number of bytes that would be freed.
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{{#include ./opt-common.md}}
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{{#include ../opt-common.md}}
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{{#include ../env-common.md}}
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# Examples
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To delete all unreachable paths, just do:
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```console
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$ nix-store --gc
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deleting `/nix/store/kq82idx6g0nyzsp2s14gfsc38npai7lf-cairo-1.0.4.tar.gz.drv'
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...
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8825586 bytes freed (8.42 MiB)
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```
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To delete at least 100 MiBs of unreachable paths:
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```console
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$ nix-store --gc --max-freed $((100 * 1024 * 1024))
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```
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