[Centos] yum update

Hi all,

Just a quick question regarding yum update. Is it possible to configure 
yum to use one of the mirror site instead of mirror.centos.org ? If its 
possible, which file need to be editted, I see three yum config in /etc



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  Roy Kartadinata
  Pixie Internet Services

  "This is Linux country. If you listen carefully, you can hear Windows 
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