Rsync

From AdminWiki

(Difference between revisions)
Jump to: navigation, search
(→Minimum working config)
 
(8 intermediate revisions not shown)
Line 1: Line 1:
= [http://rsync.samba.org/ rsync] =
= [http://rsync.samba.org/ 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. rsync can handle that.
+
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 ==
== cookbook ==
-
=== Basic functions ===
+
===Synchronize a directory===
-
 
+
-
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.
+
-
 
+
-
'''How could i keep two remote server directories synchronized without copying the whole directory every time? '''<br>
+
-
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]].
+
-
 
+
-
<pre>
+
-
rsync -avu --rsh="ssh -l <username>" <directory to sync> <username>@<remote host>:<remote directory>
+
-
</pre>
+
 +
  rsync -av -e [[ssh]] --delete <directory to sync> <username>@<remote host>:<remote directory>
===Migrating a server===
===Migrating a server===
Line 22: Line 13:
<pre>
<pre>
-
rsync -aH --numeric-ids -x --delete / <additional mountpoints> <target>
+
rsync -avH -P --numeric-ids -x --delete / <additional mountpoints> <target>
</pre>
</pre>
-
usually does the trick. This should result in an exact copy of the source tree.
+
usually does the trick. This should result in an exact copy of the source tree and gives you fancy progress bars while you wait for the rsync run to finish ;).
 +
 
 +
The --numeric-ids is necessary because you otherwise end up having garbled usernames when the source and destination OS use different username <-> userid mappings.
-
===Minimum working config===
+
===Minimum working daemon config===
<pre>
<pre>

Latest revision as of 17:02, 27 September 2007

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 --delete <directory to sync> <username>@<remote host>:<remote directory>

Migrating a server

To migrate a server, 

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

usually does the trick. This should result in an exact copy of the source tree and gives you fancy progress bars while you wait for the rsync run to finish ;).

The --numeric-ids is necessary because you otherwise end up having garbled usernames when the source and destination OS use different username <-> userid mappings.

Minimum working daemon 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 "https://amd.co.at/adminwiki/Rsync"
Personal tools