Pick a mirror on http://mirror-status.centos.org/ (e.g. mirror.vastspace.net)
Backup
ls /etc/yum.repos.d/ # CentOS-Base.repo CentOS-Debuginfo.repo CentOS-fasttrack.repo CentOS-Media.repo CentOS-Vault.repo
sudo cp /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo.bak
sudo vi /etc/yum.repos.d/CentOS-Base.repo
Update via vim commands
:%s/^#base/base/g
:%s/^mirror/#mirror/g
:%s/mirror.centos.org/mirror.vastspace.net/g
:wq
