Rsync

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= [http://rsync.samba.org/ rsync] =
= [http://rsync.samba.org/ rsync] =
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rsync is the perfect tool when you need to synchronize two files or file trees, be it just your homedirectory or a whole server. rsync can handle that.
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rsync is the perfect tool when you need to synchronize two files or file trees, be it just your homedirectory or a whole server. It's basic operation is like scp or rcp, but it has many more options which aim to keep traffic low if the amount of identical files on sender and receiver is high.
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== cookbook ==
== cookbook ==
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=== Basic functions ===
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===Synchronize a directory===
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Rsync is a small program that behaves like rcp or scp does, but has many options like the remote-update protocol or included archiving methods to make the life easier. One of the main reasons why i use that GNU tool it the feature to copy links, devices, owners, groups and permissions in one easy step.
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'''How could i keep two remote server directories synchronized without copying the whole directory every time? '''<br>
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Enable this one-liner in your [[crontab]] and it will only copy the new files to the remote server. Rsync will also update newer files, based on the access time from the [[filesystem]], with all permissions. To enable the secure transfer without a password for your [[cron]], you will have to generate a password-less [[ssh-key]].
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<pre>
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  rsync -av -e [[ssh]] <directory to sync> <username>@<remote host>:<remote directory>
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rsync -avu --rsh="ssh -l <username>" <directory to sync> <username>@<remote host>:<remote directory>
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</pre>
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Revision as of 15:28, 1 June 2006

Contents

rsync

rsync is the perfect tool when you need to synchronize two files or file trees, be it just your homedirectory or a whole server. It's basic operation is like scp or rcp, but it has many more options which aim to keep traffic low if the amount of identical files on sender and receiver is high.

cookbook

Synchronize a directory

 rsync -av -e ssh <directory to sync> <username>@<remote host>:<remote directory>


Migrating a server

To migrate a server, 

rsync -aH --numeric-ids -x --delete / <additional mountpoints> <target>

usually does the trick. This should result in an exact copy of the source tree.

Minimum working config

log file = /var/log/rsyncd.log
use chroot = yes

[modulename]
path = /path/to/module
read only = yes
list = yes
transfer logging = yes
Retrieved from "http://amd.co.at/adminwiki/Rsync"
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