Hi all Am trying to update my system Cento root at king Tue Jan 27 ~ $ yum update Loading "fastestmirror" plugin Determining fastest mirrors Could not retrieve mirrorlist http://mirrorlist.centos.org/?release=5&arch=x86_64&repo=os error was [Errno 4] IOError: <urlopen error (-3, 'Temporary failure in name resolution')> Error: Cannot find a valid baseurl for repo: base root at king Tue Jan 27 ~ $ uname -a Linux king 2.6.18-92.1.10.el5 #1 SMP Tue Aug 5 07:42:41 EDT 2008 x86_64 x86_64 x86_64 GNU/Linux Thanks