Is there a Time Machine like backup system for Ubuntu? If not, what is the closest thing?
Answer
I've used rsnapshot to excellent effect. You can have it rsync and keep as many old versions, based on time as you want/have space for. I've got 6 potential versions of things from today, daily for a week, 4 weeks, and then 6 months worth. I've already used it to recover several file I thought I'd lost due to overwriting.
The only problems I have had was it not running due to the previous run not completing in time, and so it left the lockfile dangling. This was on a remote machine that did password-less logins over SSH to rsync files off for backup/archive and I didn't log in very often to the server to check it. Running a logwatch script on there (emailing problems from the logs) at least made sure I saw the problems to restart it, and it's been hassle free ever since. On my local server, it's been no problem at all.
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