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→rsync
'''Advantage:''' Your system doesn't really go down.
{{Note|Do To decrease the downtime, you can use double rsync approach. Run rsync for the first time before stopping most of the services, and then for the second time after stopping services. That way most of the data will be transferred while your server is fully working, and the second rsync will just "catch the latest changes" which is faster.}}
=== Live CD ===
