On 18/06/2010 12:04, John Kelly wrote: > I'm having a yum problem updating a system on Centos 5.3, 64-bit ... > i.e. 'yum update' returns "No Packages Marked for Update". Problem > appears to be related to connecting to the mirrors where the > repositories are located but I could be wrong in that. What's confusing > me is that I have another system (Centos 5.5, 32-bit) that's working fine. Try hitting yum with a -d7; its hard to tell from the very little pasted data as to what the issue might be. At the very least, you dont have a valid CentOS-Base.repo in your /etc/yum.repos.d/ directory and/or your /etc/yum.conf has been changed. To check for both of those: rpm -V centos-release ; should tell you. - KB