I'm sorry if this question have been posted before I'm new to linux I install centos 5.1, i believe i did all the step right now i'm trying to do a yum update and i'm getting the fallowing error loading "installonlyn" plugin setting up update process setting up repositories could not retrieve mirrorlist http://mirrorlist.centos.org/?release=... repo =extra error was [errno 4] urlopen error (-3, temporary failure in name resolution ) Error: cannot find a valid baseurl for repo: extras can anyone help me with this... Hint* i ping www.google.com and i got ping:unknown host www.google.com could it be something wrong with the way i set up my eth0