centos 将 yum 源改为网易的镜像

如果是国内电信的，这样改会快点
cd /etc/yum.repos.d/
mv CentOS-Base.repoCentOS-Base.repo.bak
wgethttp://blog.s135.com/soft/linux/centos/5.2/CentOS-Base.repo
或 vi/etc/yum.repos.d/CentOS-Base.repo
录入：
# CentOS-Base.repo
#
#This file uses a new mirrorlist system developed by Lance Davis forCentOS.
# The mirror system uses the connecting IP address of theclient and the
# update status of each mirror to pick mirrors thatare updated to and
# geographically close to the client.  You shoulduse this for CentOS updates
# unless you are manually picking othermirrors.
#
# If the mirrorlist= does not work for you, as a fallback you can try the
# remarked out baseurl= line instead.
#
#
[base]
name=CentOS-$releasever- Base
#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=os
#baseurl=http://mirror.centos.org/centos/$releasever/os/$basearch/
baseurl=http://mirrors.163.com/centos/$releasever/os/$basearch/
gpgcheck=1
gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-5
#releasedupdates
[updates]
name=CentOS-$releasever - Updates
#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=updates
#baseurl=http://mirror.centos.org/centos/$releasever/updates/$basearch/
baseurl=http://mirrors.163.com/centos/$releasever/updates/$basearch/
gpgcheck=1
gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-5
#packagesused/produced in the build but not released
[addons]
name=CentOS-$releasever- Addons
#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=addons
#baseurl=http://mirror.centos.org/centos/$releasever/addons/$basearch/
baseurl=http://mirrors.163.com/centos/$releasever/addons/$basearch/
gpgcheck=1
gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-5
#additionalpackages that may be useful
[extras]
name=CentOS-$releasever -Extras
#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=extras
#baseurl=http://mirror.centos.org/centos/$releasever/extras/$basearch/
baseurl=http://mirrors.163.com/centos/$releasever/extras/$basearch/
gpgcheck=1
gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-5
#additionalpackages that extend functionality of existing packages
[centosplus]
name=CentOS-$releasever- Plus
#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=centosplus
#baseurl=http://mirror.centos.org/centos/$releasever/centosplus/$basearch/
baseurl=http://mirrors.163.com/centos/$releasever/centosplus/$basearch/
gpgcheck=1
enabled=0
gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-5