2020-07-23 10:58:42 +00:00
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nix-collect-garbage
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Nix
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nix-collect-garbage
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delete unreachable store paths
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nix-collect-garbage
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\--delete-old
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\-d
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\--delete-older-than
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period
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\--max-freed
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bytes
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\--dry-run
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# Description
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The command `nix-collect-garbage` is mostly an alias of [`nix-store
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--gc`](#rsec-nix-store-gc), that is, it deletes all unreachable paths in
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the Nix store to clean up your system. However, it provides two
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additional options: `-d` (`--delete-old`), which deletes all old
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generations of all profiles in `/nix/var/nix/profiles` by invoking
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`nix-env --delete-generations old` on all profiles (of course, this
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makes rollbacks to previous configurations impossible); and
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2020-07-23 12:28:05 +00:00
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`--delete-older-than` *period*, where period is a value such as `30d`,
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2020-07-23 10:58:42 +00:00
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which deletes all generations older than the specified number of days in
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all profiles in `/nix/var/nix/profiles` (except for the generations that
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were active at that point in time).
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# Example
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To delete from the Nix store everything that is not used by the current
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generations of each profile, do
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$ nix-collect-garbage -d
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