Redhat 使用CentOS的yum源进行升级或软件安装（最新6.0-6.4，不含最新版6.5）

Redhat默认的源不但速度不给力，而且软件版本陈旧，今天试着将Redhat默认源替换为CentOS的163源，发现速度能达到2M/s左右，而且版本都比较新，非常给力，与大家分享！

（目前可以使用CentOS0-6.3软件仓库的软件）

1. 删除原有的yum源

   /# rpm -aq | grep yum|xargs rpm -e --nodeps 2.下载新的yum安装包，这里使用centos-6

   /# wget http://mirror.centos.org/centos/6/os/x86_64/Packages/python-iniparse-0.3.1-2.1.el6.noarch.rpm /# wget http://mirror.centos.org/centos/6/os/x86_64/Packages/yum-metadata-parser-1.1.2-16.el6.x86_64.rpm

   /# wget http://mirror.centos.org/centos/6/os/x86_64/Packages/yum-3.2.29-40.el6.centos.noarch.rpm /# wget http://mirror.centos.org/centos/6/os/x86_64/Packages/yum-plugin-fastestmirror-1.1.30-14.el6.noarch.rpm

3.安装yum软件包 /#rpm -ivh python-iniparse-0.3.1-2.1.el6.noarch.rpm

/# rpm -ivh yum-metadata-parser-1.1.2-16.el6.x86_64.rpm
/#rpm -ivh yum-3.2.29-40.el6.centos.noarch.rpm yum-plugin-fastestmirror-1.1.30-14.el6.noarch.rpm

1. 更改yum源 在/etc/yum.repos.d/新建文件centos.repo,内容如下：

   /#/#/#/#/#/#/#/#/#/#/#/#/#/#/#/#/#/#/#/#/#/#/#/#/#/#/#/#/#/#/#/#/#/#/#/#/#/#/#/#/#/#/#/#/#/#/#/#/#/#/#/#/#/#/#/#/#/#/#/#/#/#/#/#/#/#/#/#/#/#/#/#/# /# CentOS-Base.repo

   /# /# 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-6 - Base - 163.com

   baseurl=http://mirrors.163.com/centos/6/os/$basearch/ /#mirrorlist=http://mirrorlist.centos.org/?release=6&arch=$basearch&repo=os

   gpgcheck=1 gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-6

   /#released updates [updates]

   name=CentOS-6 - Updates - 163.com baseurl=http://mirrors.163.com/centos/6/updates/$basearch/

   /#mirrorlist=http://mirrorlist.centos.org/?release=6&arch=$basearch&repo=updates gpgcheck=1

   gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-6 /#additional packages that may be useful

   [extras] name=CentOS-6 - Extras - 163.com

   baseurl=http://mirrors.163.com/centos/6/extras/$basearch/ /#mirrorlist=http://mirrorlist.centos.org/?release=6&arch=$basearch&repo=extras

   gpgcheck=1 gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-6

   /#additional packages that extend functionality of existing packages [centosplus]

   name=CentOS-6 - Plus - 163.com baseurl=http://mirrors.163.com/centos/6/centosplus/$basearch/

   /#mirrorlist=http://mirrorlist.centos.org/?release=6&arch=$basearch&repo=centosplus gpgcheck=1

   enabled=0 gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-6

   /#contrib - packages by Centos Users [contrib]

   name=CentOS-6 - Contrib - 163.com baseurl=http://mirrors.163.com/centos/6/contrib/$basearch/

   /#mirrorlist=http://mirrorlist.centos.org/?release=6&arch=$basearch&repo=contrib gpgcheck=1

   enabled=0 gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-6

   /#/#/#/#/#/#/#/#/#/#/#/#/#/#/#/#/#/#/#/#/#/#/#/#/#/#/#/#/#/#/#/#/#/#/#/#/#/#/#/#/#/#/#/#/#/#/#/#/#/#/#/#/#/#/#/#/#/#/#/#/#/#/#/#/#/#/#/#/#/#/#/#/# 或者下载文件CentOS6-Base-163.repo：

wget http://mirrors.163.com/.help/CentOS6-Base-163.repo 将其中的

baseurl=http://mirrors.163.com/centos/$releasever/contrib/$basearch/

/#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=contrib 的$releasever 修改为 6

mv CentOS6-Base-163.repo /etc/yum.repos.d/CentOS-Base.repo 5.清理yum缓存

/# yum clean all
/# yum makecache /#将服务器上的软件包信息缓存到本地,以提高搜索安装软件的速度

/# yum install software_name /#测试新源是否可用

6.更新系统

/#yum update -y

问题：

（1）如果出现域名不能解析的情况，添加nameserver 8.8.8.8到/etc/resolv.conf中即可。