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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 | <html><head><meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"><title>Recovering Mailbox Data</title><link rel="stylesheet" type="text/css" href="styles.css"><meta name="generator" content="DocBook XSL Stylesheets V1.78.1"><link rel="home" href="index.html" title="Cedar Backup 2 Software Manual"><link rel="up" href="apc.html" title="Appendix C. Data Recovery"><link rel="prev" href="apcs04.html" title="Recovering Subversion Data"><link rel="next" href="apcs06.html" title="Recovering Data split by the Split Extension"></head><body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center">Recovering Mailbox Data</th></tr><tr><td width="20%" align="left"><a accesskey="p" href="apcs04.html">Prev</a> </td><th width="60%" align="center">Appendix C. Data Recovery</th><td width="20%" align="right"> <a accesskey="n" href="apcs06.html">Next</a></td></tr></table><hr></div><div class="sect1"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a name="cedar-recovering-mbox"></a>Recovering Mailbox Data</h2></div></div></div><p>
Mailbox data is gathered by the Cedar Backup mbox extension.
Cedar Backup will create either full or incremental backups, but
both kinds of backups are treated identically when restoring.
</p><p>
Individual mbox files and mbox directories are treated a little
differently, since individual files are just compressed, but
directories are collected into a tar archive.
</p><p>
First, find the backup or backups you are interested in. Typically,
you will need the full backup from the first day of the week and each
incremental backup from the other days of the week.
</p><p>
The mbox extension creates files of the form
<code class="filename">mbox-*</code>. Backup files for individual mbox files might have a
<code class="filename">.gz</code> or <code class="filename">.bz2</code> extension
depending on what kind of compression you specified in configuration.
Backup files for mbox directories will have a <code class="filename">.tar</code>,
<code class="filename">.tar.gz</code> or <code class="filename">.tar.bz2</code> extension,
again depending on what kind of compression you specified in configuration.
</p><p>
There is one backup file for each configured mbox file or directory.
The backup file name represents the name of the file or directory and
the date it was backed up. So, the file
<code class="filename">mbox-20060624-home-user-mail-greylist</code> represents
the backup for <code class="filename">/home/user/mail/greylist</code> run on 24
Jun 2006. Likewise,
<code class="filename">mbox-20060624-home-user-mail.tar</code> represents the
backup for the <code class="filename">/home/user/mail</code> directory run on
that same date.
</p><p>
Once you have found the files you are looking for, the restoration
procedure is fairly simple. First, concatenate all of the backup
files together. Then, use grepmail to eliminate duplicate messages
(if any).
</p><p>
Here is an example for a single backed-up file:
</p><pre class="screen">
root:/tmp# rm restore.mbox # make sure it's not left over
root:/tmp# cat mbox-20060624-home-user-mail-greylist >> restore.mbox
root:/tmp# cat mbox-20060625-home-user-mail-greylist >> restore.mbox
root:/tmp# cat mbox-20060626-home-user-mail-greylist >> restore.mbox
root:/tmp# grepmail -a -u restore.mbox > nodups.mbox
</pre><p>
At this point, <code class="filename">nodups.mbox</code> contains all of the
backed-up messages from <code class="filename">/home/user/mail/greylist</code>.
</p><p>
Of course, if your backups are compressed, you'll have to use
<span class="command"><strong>zcat</strong></span> or <span class="command"><strong>bzcat</strong></span> rather than just
<span class="command"><strong>cat</strong></span>.
</p><p>
If you are backing up mbox directories rather than individual files,
see the filesystem instructions for notes on now to extract the
individual files from inside tar archives. Extract the files you are
interested in, and then concatenate them together just like shown
above for the individual case.
</p></div><div class="navfooter"><hr><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="apcs04.html">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="apc.html">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="apcs06.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top">Recovering Subversion Data </td><td width="20%" align="center"><a accesskey="h" href="index.html">Home</a></td><td width="40%" align="right" valign="top"> Recovering Data split by the Split Extension</td></tr></table></div></body></html>
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