Few days ago, the PHP development team announced the availability of a new PHP 5.3.29 version. This release contains about 25 potentially security related fixes back-ported from PHP 5.4 and PHP 5.5. So, if you're running some older CMSes, scripts or web applications or whatever, I strongly recommend you make them compatible with the latest PHP version available.
Simple steps on how to install and set-up Exim4 with Remote SMTP Smart Server in Ubuntu or Debian.
Installing and setting up a chrooted slave DNS server using NAMED (BIND) in an ArchLinux system. That's what this artcile is all about . You need to have set-up a master DNS server before setting up a slave DNS server.
Installing and setting up OpenVPN in ArchLinux is covered in the article below. As always, make sure you also consult the official OpenVPN WiKi page as well. The same OpenVPN set-up in Gentoo system has been covered here and if using Debian Wheezy refer to this great article on how to install and set-up OpenVPN.