yum是centos下很方便的rpm包管理工具，配置第三方软件库使你的软件库更加丰富。以下简单的讲下配置的步骤。
首先，需要安装yum-priorities插件：
| yum install yum-priorities -y |
该插件的作用主要是设置调用源时的优先级的，一般将官方的优先级设置为最高。例如：
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[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/ gpgcheck=1 gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-6 priority=1 |
在每个[]段的最后加上priority=[]字段来设置每个镜像的优先级，1为最高，99为最低。
一般的配置为:
[base], [addons], [updates], [extras] … priority=1
[CentOSplus],[contrib] … priority=2
其他第三的软件源为：priority=N （推荐N>10）
安装epel.repo，下载地址为 http://download.fedora.redhat.com/pub/epel/ 找与自己系统版本相符的包
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rpm -ivh http://download.fedora.redhat.com/pub/epel/6/x86_64/epel-release-6-5.noarch.rpm rpm --import /etc/pki/rpm-gpg/RPM-GPG-KEY-EPEL-6 |
修改epel.repo，
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[epel] name=Extra Packages for Enterprise Linux 6 - $basearch #baseurl=http://download.fedoraproject.org/pub/epel/6/$basearch mirrorlist=https://mirrors.fedoraproject.org/metalink?repo=epel-6&arch=$basearch failovermethod=priority enabled=1 gpgcheck=1 gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-EPEL-6 priority=11 |
设置epel.repo的优先级为11.
安装rpmforge.repo，下载地址为 http://pkgs.repoforge.org/rpmforge-release/ 找与自己系统版本相符的包
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wget http://pkgs.repoforge.org/rpmforge-release/rpmforge-release-0.5.2-2.el6.rf.x86_64.rpm wget http://dag.wieers.com/rpm/packages/RPM-GPG-KEY.dag.txt rpm -import RPM-GPG-KEY.dag.txt rpm -K rpmforge-release-0.5.2-2.el6.rf.x86_64.rpm rpm -ivh rpmforge-release-0.5.2-2.el6.rf.x86_64.rpm |
修改rpmforge.repo，
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[rpmforge] name = RHEL $releasever - RPMforge.net - dag baseurl = http://apt.sw.be/redhat/el6/en/$basearch/rpmforge mirrorlist = http://apt.sw.be/redhat/el6/en/mirrors-rpmforge #mirrorlist = file:///etc/yum.repos.d/mirrors-rpmforge enabled = 1 protect = 0 gpgkey = file:///etc/pki/rpm-gpg/RPM-GPG-KEY-rpmforge-dag gpgcheck = 1 priority=12 |
设置rpmforge.repo优先级为12
安装rpmfusion.repo,下载地址为http://download1.rpmfusion.org
修改rpmfusion.repo，
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[rpmfusion-nonfree-updates-testing] name=RPM Fusion for EL 6 - Nonfree - Test Updates #baseurl=http://download1.rpmfusion.org/nonfree/el/updates/testing/6/$basearch/ mirrorlist=http://mirrors.rpmfusion.org/mirrorlist?repo=nonfree-el-updates-testing-6&arch=$basearch enabled=1 gpgcheck=1 gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-rpmfusion-nonfree-el-6 priority=13 |
设置优先级为13
测试：
| yum check-update |
会载入yum-priorities插件
| yum install nginx -y |
能成功安装。
参考文档：http://wiki.centos.org/zh/AdditionalResources/Repositories/RPMForge