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Under Linux,

I have an SSD as my main boot disk with about 50 GB or so of data, and a mostly empty 2TB HDD for bulk storage.

I would like to run a cron job periodically that does a full/incremental backup of my SSD's file system to my HDD. I remember one of my old sysadmins used to use a Perl-based one that was very good and did an incremental backup using hard-links, but I can't remember the name of it (anyone?). Or failing that can anyone recommend an appropriate package?

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rsync is the way I'd go for this. –  Rob Mar 28 '12 at 18:29
    
@Rob: rsync doesn't do incremental backup AFAIK? I'd like to be able to go back some time period and get an older image, without having to do a full backup everytime. –  Andrew Tomazos Mar 28 '12 at 18:32
    
Oh, yeah. Totally skipped a word, my bad. Some google searches turn up results for incremental backups with rsync –  Rob Mar 28 '12 at 18:37
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up vote 2 down vote accepted

You want rsnapshot. It uses rsync and hard links to efficiently copy only changes to the backup, and keep multiple directories that each appear to be a full backup, but unchanged files are hard linked so they don't take up more space.

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