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FTP program to keep remote files in synch

rsync is a replacement for rcp that has many more features. rsync uses the "rsync algorithm" which provides a very fast method for bringing remote files into sync by sending just the differences in the files across the link, without requiring that both sets of files are present at one of the ends of the link beforehand. At first glance this may seem impossible because the calculation of diffs between two files normally requires local access to both files. A technical report describing the rsync algorithm is included with this package. Features include:

  • Ability to whole directory trees and filesystems
  • Optionally preserves symbolic links, hard links, file ownership,
  • permissions, devices and times
  • Requires no special privilages to install
  • Internal pipelining reduces latency for multiple files
  • Can use rsh, ssh or direct sockets as the transport
  • Supports anonymous rsync which is ideal for mirroring


User man pages available in HTML form from; programmer's copy of rsync.conf pages available in HTML form from


Download version 3.1.2 (stable)
released on 21 December 2015

VCS Checkout login password: cvs


Related Projects


LicenseVerified byVerified onNotes
GPLv2orlaterKelly Hopkins26 January 2009
GPLv3orlaterKelly Hopkins26 January 2009

Leaders and contributors

Andrew Tridgell Maintainer

Resources and communication

Audience Resource type URI
Developer,Help,Support E-mail
Bug Tracking Homepage

Software prerequisites

Kind Description
Required to use rsh/ssh (ssh recommended for security reasons)

This entry (in part or in whole) was last reviewed on 20 February 2017.


Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.3 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the page “GNU Free Documentation License”.

The copyright and license notices on this page only apply to the text on this page. Any software or copyright-licenses or other similar notices described in this text has its own copyright notice and license, which can usually be found in the distribution or license text itself.

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