lix/doc/manual/src/command-ref/nix-collect-garbage.md
2020-07-23 18:27:12 +02:00

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nix-collect-garbage
1
Nix
nix-collect-garbage
delete unreachable store paths
nix-collect-garbage
\--delete-old
\-d
\--delete-older-than
period
\--max-freed
bytes
\--dry-run
# Description
The command `nix-collect-garbage` is mostly an alias of [`nix-store
--gc`](#rsec-nix-store-gc), that is, it deletes all unreachable paths in
the Nix store to clean up your system. However, it provides two
additional options: `-d` (`--delete-old`), which deletes all old
generations of all profiles in `/nix/var/nix/profiles` by invoking
`nix-env --delete-generations old` on all profiles (of course, this
makes rollbacks to previous configurations impossible); and
`--delete-older-than` period, where period is a value such as `30d`,
which deletes all generations older than the specified number of days in
all profiles in `/nix/var/nix/profiles` (except for the generations that
were active at that point in time).
# Example
To delete from the Nix store everything that is not used by the current
generations of each profile, do
$ nix-collect-garbage -d