[Gllug] Unattended backup solution

[James McGuigan]

An alternative to rsync for backup is rdiff-backup http://www.nongnu.org/rdiff-backup/

After the first backup, it only needs to copy over changed files, but it also
generates a diff of the file with each new change, which effectively gives you an
incremental backup as well. The current files are stored as a normal uncompressed
files in a directory tree mirror, with an additional metafile to store extra
information about hard links and permissions if they are not supported on the backup
disk file system.

Its is fairly user friendly. In theory it should be fairly reliable, though I haven't
been using it long enough to say how reliable it actually is in mission-critical
situations (it is written in python).


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