CentOS 5.5 is the fifth update to the CentOS 5 distribution series. It contains a lot of bugfixes, updates and new functionality. New Packages on CentOS 5.5 freeradius2 gsl postgresql84 python-dmidecode samba3x tunctl xz gpxe (x86_64 only) Some package updates exim 4.63 gcc 4.1.2 kernel 2.6.18 OpenOffice.org 3.1.1 php 5.1.6 xen 3.0.3 yum 3.2.22 httpd 2.2.3 Most interesting update is PostgreSQL 8.4. Of course, many have used the 8.4 version of PostgreSQL on CentOS for a long time, but now it can also be found directly on CentOS 5.