先進入yum源配置目錄
cd /etc/yum.repos.d
備份系統自帶的yum源
mv CentOS-Base.repo CentOS-Base.repo.save
163的yum源：
wget http://mirrors.163.com/.help/CentOS-Base-163.repo
sohu的yum源：
wget http://mirrors.sohu.com/help/CentOS-Base-sohu.repo
或者：cd /etc/yum.repos.d/; wget http://mirrors.163.com/.help/CentOS-Base-163.repo -O 163.repo; sed -i -e s/\$releasever/6.5/g -e s/gpgcheck=1/gpgcheck=0/g -e 28,35d 163.repo; yum makecache
(記得替換$releasever爲6.5或者5.10)
更新玩yum源後，建議更新一下，使操作立即生效
yum makecache
爲CentOS安裝EPEL軟件倉庫
EPEL全稱: Extra Packages for Enterprise Linux.傳說中最全的yum源
通過以下命令安裝:
CentOS 6.x 32-bit
rpm -Uvh http://mirror.overthewire.com.au/pub/epel/6/i386/epel-release-6-7.noarch.rpm
CentOS 6.x 64-bit
rpm -Uvh http://download.fedoraproject.org/pub/epel/6/x86_64/epel-release-6-7.noarch.rpm
CentOS 5.x 32-bit
rpm -Uvh http://dl.fedoraproject.org/pub/epel/5/i386/epel-release-5-4.noarch.rpm
CentOS 5.x 64-bit
rpm -Uvh http://dl.fedoraproject.org/pub/epel/5/x86_64/epel-release-5-4.noarch.rpm
想暫停使用EPEL，在下面的文件中設置enabled=0即可.
vim /etc/yum.repos.d/epel.repo