centos6的yum源

因为CentOS是RHEL的完整重新编译版本(版本号需对应），所以RHEL是一定可以用CentOS的
yum源的。
若安装了多个yum源，可以安装yum-fastestmirror软件，以实现自动选择最快的源，即
#yum install yum-fastestmirror -y
安装时注意需将yum源文件放于/etc/yum.repos.d/目录下，文件名以.repo结尾即可
安装完成后执行
       #yum clean all 或者 yum makecache 用以清除缓存文件
以下为中科大的CentOS6的更新源
#CentOS-Base.rentOS-Base.repo
[base]
name=CentOS-$releasever - Base
baseurl=
gpgcheck=1
gpgkey=


#released updates
[updates]
name=CentOS-$releasever - Updates
baseurl=
gpgcheck=1
gpgkey=

#packages used/produced in the build but not released
#[addons]
#name=CentOS-$releasever - Addons
#baseurl=
#gpgcheck=1
#gpgkey=
#additional packages that may be useful
[extras]
name=CentOS-$releasever - Extras
baseurl=
gpgcheck=1
gpgkey=
#additional packages that extend functionality of existing packages
[centosplus]
name=CentOS-$releasever - Plus
baseurl=
gpgcheck=1
enabled=0
gpgkey=

下面是搜狐的：
[base]
name=CentOS-$releasever - Base
baseurl=
gpgcheck=1
gpgkey=

#additional packages that extend functionality of existing packages
[centosplus]
name=CentOS-$releasever - Plus
baseurl=
gpgcheck=1
enabled=0
gpgkey=
下面是网易163的源：
# CentOS-Base.repo
[base]
name=CentOS-$releasever - Base
baseurl=
gpgcheck=1
gpgkey=

#released updates
[updates]
name=CentOS-$releasever - Updates
baseurl=
gpgcheck=1
gpgkey=

#packages used/produced in the build but not released
#[addons]
#name=CentOS-$releasever - Addons
#baseurl=
#gpgcheck=1
#gpgkey=
#additional packages that may be useful
[extras]
name=CentOS-$releasever - Extras
baseurl=
gpgcheck=1
gpgkey=
#additional packages that extend functionality of existing packages
[centosplus]
name=CentOS-$releasever - Plus
baseurl=
gpgcheck=1
enabled=0
gpgkey=