163的开源镜像地址 http://mirrors.163.com/.help/CentOS-Base-163.repo
sohu的开源镜像地址 http://mirrors.sohu.com/help/CentOS-Base-sohu.repo
中国科技大学 http://centos.ustc.edu.cn/CentOS-Base.repo
如果使用上面YUM源的话,最好把里面的 mirrorlist 注释掉,否则系统会启动 fastesmirror 插件自动检查的,并不一定会使用这个yum源的.
我用的是中国科技大学的速度不错。
法一：直接下载源文件
CentOS USTC mirror 这个镜像不错，大家更新可用这个
#yum -y install wget
#cd /etc/yum.repos.d
#mv CentOS-Base.repo CentOS-Base.repo.save
#wget http://centos.ustc.edu.cn/CentOS-Base.repo
注意：如果为第一次安装的新系统的话，则需要先安装wget这个下载软件，不然没有办法下载ＣentOS-Base.repo这个文件的。
法二：手动创建源文件
更改yum镜像站点为中国站点地址,推荐http://centos.ustc.edu.cn/centos/。(中国科技大学)
#cd /etc/yum.repos.d/
#mv CentOS-Base.repo CentOS-Base.repo.bak
#vi CentOS-Base.repo
修改 /etc/yum.repos.d/CentOS-Base.repo 如下：
#———————————–分割线以内的———————————————–
# 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-$releasever - Base
#mirrorlist=http://mirrorlist./?release=$releasever&arch=$basearch&repo=os
baseurl=http://centos.ustc.edu.cn/centos/$releasever/os/$basearch/
gpgcheck=1
gpgkey=http://mirror./centos/RPM-GPG-KEY-CentOS-5
#released updates
[updates]
name=CentOS-$releasever - Updates
#mirrorlist=http://mirrorlist./?release=$releasever&arch=$basearch&repo=updates
baseurl=http://centos.ustc.edu.cn/centos/$releasever/updates/$basearch/
gpgcheck=1
gpgkey=http://mirror./centos/RPM-GPG-KEY-CentOS-5
#packages used/produced in the build but not released
[addons]
name=CentOS-$releasever - Addons
#mirrorlist=http://mirrorlist./?release=$releasever&arch=$basearch&repo=addons
baseurl=http://centos.ustc.edu.cn/centos/$releasever/addons/$basearch/
gpgcheck=1
gpgkey=http://mirror./centos/RPM-GPG-KEY-CentOS-5
#additional packages that may be useful
[extras]
name=CentOS-$releasever - Extras
#mirrorlist=http://mirrorlist./?release=$releasever&arch=$basearch&repo=extras
baseurl=http://centos.ustc.edu.cn/centos/$releasever/extras/$basearch/
gpgcheck=1
gpgkey=http://mirror./centos/RPM-GPG-KEY-CentOS-5
#additional packages that extend functionality of existing packages
[centosplus]
name=CentOS-$releasever - Plus
#mirrorlist=http://mirrorlist./?release=$releasever&arch=$basearch&repo=centosplus
baseurl=http://centos.ustc.edu.cn/centos/$releasever/centosplus/$basearch/
gpgcheck=1
enabled=0
gpgkey=http://mirror./centos/RPM-GPG-KEY-CentOS-5
#———————————–分割线以内的———————————————–
简单的说就是把mirrorlist注释掉，将baseurl改成centos.ustc.edu.cn的镜像地址。
用下面命令测试:
[root@localhost yum.repos.d]# yum upgrade
