[sSTL]

שאני מנסה להריץ התקנה או עדכון אני מקבל

[root@server ~]# yum upgrade
Repository base is listed more than once in the configuration
Repository updates is listed more than once in the configuration
http://vm.bb.harker.com/centos/5.2/os/x86_64/repodata/repomd.xml: [Errno 4] IOError: <urlopen error (-2, 'Name or service not known')>
Trying other mirror.
Error: Cannot retrieve repository metadata (repomd.xml) for repository: base. Please verify its path and try again

למי יש רעיון איך לתקן את זה??