CentOS 5.5 yum源修改

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#运维

本文介绍如何更换CentOS的yum源以提高下载速度。通过备份原始repo文件并替换为中科大镜像站点的新repo文件，可以显著提升组件安装效率。

在CentOS系统中，yum是个好东西，一组件可以直接通过yum来安装，但系统默认的yum源速度往往不尽人意，为了达到快递安装的目的，在这里就需要修改yum源

中科大的Centos 开源镜像站点. http://centos.ustc.edu.cn/

执行以下命令就可以了

cd /etc/yum.repos.d

mv CentOS-Base.repo CentOS-Base.repo.bak

wget http://centos.ustc.edu.cn/CentOS-Base.repo.5

mv CentOS-Base.repo.5 CentOS-Base.repo

cat CentOS-Base.repo

[base]
name=CentOS-$releasever - Base
baseurl=http://centos.ustc.edu.cn/centos/$releasever/os/$basearch/
gpgcheck=1
gpgkey=http://centos.ustc.edu.cn/centos/RPM-GPG-KEY-CentOS-5

#released updates
[updates]
name=CentOS-$releasever - Updates
baseurl=http://centos.ustc.edu.cn/centos/$releasever/updates/$basearch/
gpgcheck=1
gpgkey=http://centos.ustc.edu.cn/centos/RPM-GPG-KEY-CentOS-5

#packages used/produced in the build but not released
[addons]
name=CentOS-$releasever - Addons
baseurl=http://centos.ustc.edu.cn/centos/$releasever/addons/$basearch/
gpgcheck=1
gpgkey=http://centos.ustc.edu.cn/centos/RPM-GPG-KEY-CentOS-5

#additional packages that may be useful
[extras]
name=CentOS-$releasever - Extras
baseurl=http://centos.ustc.edu.cn/centos/$releasever/extras/$basearch/
gpgcheck=1
gpgkey=http://centos.ustc.edu.cn/centos/RPM-GPG-KEY-CentOS-5

#additional packages that extend functionality of existing packages
[centosplus]
name=CentOS-$releasever - Plus
baseurl=http://centos.ustc.edu.cn/centos/$releasever/centosplus/$basearch/
gpgcheck=1
enabled=0
gpgkey=http://centos.ustc.edu.cn/centos/RPM-GPG-KEY-CentOS-5