When comparing rsync vs OwnCloud, the Slant community recommends rsync for most people. In the question“What are the best personal file-syncing solutions?” rsync is ranked 2nd while OwnCloud is ranked 18th. The most important reason people chose rsync is:
Only the changed parts of files are synced. For instance, if a long log file increases by just a few lines of text, a small diff will be sent to and saved in the archive. Rsync also compresses data in transit.
Specs
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Pros
Pro Fast and bandwidth efficient
Only the changed parts of files are synced. For instance, if a long log file increases by just a few lines of text, a small diff will be sent to and saved in the archive. Rsync also compresses data in transit.
Pro Works over SSH
SSH support allows sending files securely over the network by encrypting all communcation.
Pro Pre-installed on OSX and most Linux distributions
Many *nix systems bundle rsync so there's nothing to install. All you need to do is open up the terminal and start using rsync.
Pro Free and open source
Licensed under GNU.
Pro Open source software
Pro Allows selective sync
Desktop clients offer sync almost as versatile as dropbox.
Pro You have full control with your data
Only chose a provider or host it on your soho-server.
Cons
Con No official GUI
To use rsync, you have to know your way around the command line.
Con Complicated, and you can accidentally overwrite the wrong files
Con Not plug and play as Dropbox etc
You may need some help installing it on your web space, though some providers offer free install server.