Rsync - synchronizes files and directories from one location to another

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Contents

Background

rsync[1] is a free software computer program for Unix systems which synchronizes files and directories from one location to another while minimizing data transfer using delta encoding when appropriate. 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.[2] [3]

rsync can copy or display directory contents and copy files, optionally using compression and recursion.

rsyncd, the rsync protocol daemon, uses the default TCP port of 873. rsync can also be used to synchronize local directories, or via a remote shell such as RSH or SSH. In the latter case, the rsync client executable must be installed on the near as well as the far host (the computer running the remote shell daemon). There also exists a utility called rdiff[4], which can be used for incremental backups.

The Mac OS X filesystem has a special version, rsyncX[5], which allow transferring resource forks. To run rsync on Microsoft Windows, the Cygwin package is necessary[6] to provide the expected system interfaces. A package combination is available that include rsync, cygwin, and an installer, making it easier and more familiar to Windows users[7].

There are several well written tutorials on using rsync[8][9][10][11]

Installation

Compile from source

On any distribution FreeLink or OpenLink

  1. Make sure you have installed the Precompiled C development environment, running on the LS first.
  2. Get the source, make and install. 
wget http://samba.anu.edu.au/ftp/rsync/rsync-2.6.8.tar.gz 
gunzip rsync-2.6.8.tar.gz 
tar -xf rsync-2.6.8.tar 
cd rsync-2.6.8
./configure 
make 
su root 
make install

Raw Binaries

PowerPC

From the Yahoo! Linkstation General Group [12] 

wget http://ls.jcedata.net/rsync
chmod a+x rsync
cp rsync /usr/bin

FreeLink

Use apt-get to install rsync 

apt-get install rsync

OpenLink (Ipkg)

PowerPC

ipkg install rsync

MIPSel

Alexander Skwar has created a fairly extensive selection of Ipkg packages for the MIPSel (LS2) LinkStation, Install Ipkg and enable his feed: 

ipkg install rsync

References

  1. ↑ Wikipedia: rsync
  2. ↑ rsync homepage
  3. ↑ rsync algorithm
  4. ↑ rdiff-backup homepage
  5. ↑ RsyncX - Frontend for rsync under Mac OS X
  6. ↑ Rsync for Windows - using Cygwin
  7. ↑ NasBackup rsync Windows GUI
  8. ↑ Tutorial: Using rsync
  9. ↑ Tutorial: Mirroring with rsync
  10. ↑ Tutorial: Backing up files with rsync
  11. ↑ Tutorials (with screenshots) for setup of Rsync on Windows, Rsync on Linux/Unix/BSD
  12. ↑ From the Yahoo! Linkstation General Group: rsync binaries anyone / SSH without password as root INTO LinkStation
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