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Ok, so I want to say Time Machine, but that's note exactly what I'm looking for. I want to set up a system that will regularly (hourly?) back up the /home directory of our machine. time Machine style things are naturally preferable since they save space by only saving the changes, but honestly, this is important enough that I can suffer some waste.

Any ideas?

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You can use rsync, the crontab and some scripts to take regular snapshots.

there is also rdiff-backup, which does much the same thing:

and a third option is rsnapshot:

also, take a look at this very similar question:

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Shoot, beat me to it! – rob Jun 15 '10 at 17:56
I just use I set of rsync scripts at the moment, I keep meaning to move to one of the snapshot approaches. – andynormancx Jun 15 '10 at 17:57
I've also used Dirvish in the past--it's just another rsync-based snapshot script. – rob Jun 15 '10 at 18:05

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