将yum的目标服务器更改为中国大陆服务器镜像

修改/etc/yum.repos.d/CentOS-Base.repo，将镜象站点地址改为在中国的镜象站点地址。不然我们通过yum安装软件速度会比较慢。
以下的URL地址我都验证过了在当前完全可以下载,而且速度挺快.
mv /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo.bak
vi /etc/yum.repos.d/CentOS-Base.repo

代码:

# CentOS-Base.repo
#
# This file uses a new mirrorlist system developed by Lance Davis for CentOS.
# The mirror system uses the connecting IP address of the client and the# update status of each mirror to pick mirrors that are updated to and
# geographically close to the client.  You should use this for CentOS updates
# unless you are manually picking other mirrors.
#
# If the mirrorlist= does not work for you, as a fall back you can try the 
# remarked out baseurl= line instead.
#
#
 
[base]
name=CentOS-$releasever - Base
baseurl=
        
        
        
gpgcheck=1
gpgkey=
#released updates
[update]
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-$releasever - Plus
baseurl=
gpgcheck=1
enabled=0
gpgkey=
#contrib - packages by Centos Users
[contrib]
name=CentOS-$releasever - Contrib
baseurl=
gpgcheck=1
enabled=0
gpgkey=