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https://wiki.ubuntu.com/TimeVault

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• TimeVault
  "a simple front-end for making snapshots of a set of directories. Restore functionality is integrated into Nautilus - previous versions of a file or directory that has a snapshot can be accessed by examining the properties and selecting the 'Previous Versions' tab. Snapshots are protected from accidental deletion or modification since they are read-only by default. The super-user can delete intermediate snapshots to save space, but files and directories that existed before or after the deletion will still be accessible."
  By Xyzzy in Computers & Electronics with backup__recovery frontends gnome gui linux nautilus software ubuntu

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