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Let's say that I have 50GB of off site storage and my VPS has a hard drive of 30GB. If I wanted to back-up my entire VPS (take note that cPanel/WHM is installed) every 24 hours, how would I do so and which method is the best? I have noticed a lot of people use a software called R1Sync but I'm not familiar with this at all.

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You don't specify the server's OS, but if it is running unix/linux I would use rsync. It has the capability to only backup file changes and new files.

Now, if I was the one configuring it, I would have ssh on the backup server configured to use public key authentication for the webserver. I would then configure a cronjob to run as often as I needed.

The rsync command would look something like:

rsync -az -e ssh user@remotehost:/path/on/remote/host /path/to/backup/

Of course, if you put the command in cron, it is a good idea to redirect the standard output and standard error.

rsync -az -e ssh user@remotehost:/path/on/remote/host /path/to/backup/ &> /var/log/rsync-backup.log

Also, what are you trying to backup your VPS for? (hardware failure, accidentally deleted files, etc)

If you decide to use rsync, I would suggest reading up on all of the capabilities available.

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Sorry for not specifying the OS, I'm running CentOS 5.6. I would use the backup for hardware failure. Cheers for the heads up on RSYNC! –  Dean May 22 '11 at 13:51
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