Greylisting with Exim, Python and MySQL – greylisting-py 1.0

January 26th, 2008

I just released a working version of my own greylisting implementation, written in Python and using a MySQL database. I originally wrote this for our mail server at work, as the existing implementations I found online did not satisfy my needs completely. Read the rest of this entry »

CentOS 4.5 -> 4.6 update on a Virtuozzo VPS

December 18th, 2007

Updating from CentOS 4.5 to 4.6 is very easy. All you have to do is use yum : a simple “yum update” is all you need to do.

However, when updating CentOS to the new 4.6 version on a Virtuozzo VPS, you may encounter a dependency error. On my VPS, I got the following message : Read the rest of this entry »

Simple incremental backup with rsync over SSH

December 1st, 2007

SSH and rsync can be used as a powerful backup tool. Together with hard links, it is also possible to use it to make incremental backups using a simple script. Read the rest of this entry »

Xen troubleshooting

November 17th, 2007

Some problems you may have with Xen and their possible causes…

These are problems I had with CentOS5 host/guests setup using LVM without a virtual disk, and without using the Redhat’s virt-manager tool, but of course it may also apply to other kinds of setup.

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CentOS 5 Xen images – part 2: installing the Xen guest

November 3rd, 2007

OK, so you downloaded an image from jailtime.org or you made your own image as described in my previous post, and now you want to install a Xen guest using it. Here’s how to do it :

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