http://lists.centos.org/pipermail/centos-announce/2011-April/017282.html If running 5.5 just do yum update. On a side note. I wonder how many 5.5 users will update seeing that Scientific Linux SL6 is there for the taking. Also I presume CentOS 6 will now be getting all the devs. attention so it can't be much longer till it is released - or can it ?