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rsync is a utility software and network protocol for Unix-like systems (with ports to Windows ) that synchronizes files and directories from one location to another while minimizing data transfer by using delta encoding when appropriate. Quoting the official website : "rsync is a file transfer program for Unix systems. rsync uses the 'rsync algorithm' which provides a very fast method for bringing remote files into sync." [ 3 ] An important feature of rsync not found in most similar programs/protocols is that the mirroring takes place with only one transmission in each direction. [ why? ] [ 4 ] rsync can copy or display directory contents and copy files, optionally using compression and recursion .
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