Hammer is very much like having your entire filesystem in git. https://www.dragonflybsd.org/hammer/ https://www.dragonflybsd.org/hammer/ "HAMMER retains a fin

Hammer is very much like having your entire filesystem in git. https://www.dragonflybsd.org/hammer/ https://www.dragonflybsd.org/hammer/ "HAMMER retains a fine-grained history. The state of the filesystem can be accessed live on 30-60 second boundaries without having to make explicit snapshots, up to a configurable fine-grained retention time. A convenient undo command is provided for single-file history, diffs, and extractions. Snapshots may be used to access entire directory trees." edit: Just now, 10 minutes after posting this, I regretted deleting a file (cabal.sandbox.config) and was able to restore it: > rm cabal.sandbox.config // oops > undo -i cabal.sandbox.config cabal.sandbox.config: ITERATE ENTIRE HISTORY 0x000000010bf2e940 17-Apr-2015 06:50:48 0x0000000112282990 18-Apr-2015 20:36:53 > undo -t 0x0000000112282990 -o cabal.sandbox.config cabal.sandbox.config