Hi, I've read some posts in the forums which seems to indicate that not every CentOS version is well supported. Is it possible to install CentOS 5.5 on a server and only apply security updates for 7 years? Or is the preferred way to upgrade to each minor version? Thanks in advance! Relevant forum quotes: Probably not relevant to the problem; however, the current release is 5.4 - 5.3 is getting seriously obsolete with respect to security problems and bugs. http://centos.caosity.org/modules/newbb/viewtopic.php?viewmode=flat&order=ASC&topic_id=25069&forum=39&move=prev&topic_time=1267482814 If you really mean 5.0, it is seriously obsolete and has numerous known bugs and security issues that have been fixed in subsequent updates. Obsolete releases are not supported, nor is it advisable to be installing or running them. See the CentOS 5.5 Release Notes for details. https://www.centos.org/modules/newbb/viewtopic.php?topic_id=26339&forum=37