默认centos自带的源少了很多好软件，所以需要添加第三方源。

1.安装yum源优先级插件yum-priorities

#yum install yum-plugin-priorities.noar

#yum install yum-plugin-fastestmirror

2.设置CentOS默认yum源的优先级为最高

[root@Cacti yum.repos.d]#cd /etc/yum.repos.d

[root@Cactiyum.repos.d]# vi CentOS-Base.repo

[base]

name=CentOS-$releasever - Base

mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=os&infra=$infra

#baseurl=http://mirror.centos.org/centos/$releasever/os/$basearch/

gpgcheck=1

gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-6

priority=1

#released updates

[updates]

name=CentOS-$releasever - Updates

mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=updates&infra=$infra

#baseurl=http://mirror.centos.org/centos/$releasever/updates/$basearch/

#additional packages that may be useful

[extras]

name=CentOS-$releasever - Extras

mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=extras&infra=$infra

#baseurl=http://mirror.centos.org/centos/$releasever/extras/$basearch/

#additional packages that extendfunctionality of existing packages

[centosplus]

name=CentOS-$releasever - Plus

mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=centosplus&infra=$infra

#baseurl=http://mirror.centos.org/centos/$releasever/centosplus/$basearch/

enabled=0

priority=2

#contrib - packages by Centos Users

[contrib]

name=CentOS-$releasever - Contrib

mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=contrib&infra=$infra

#baseurl=http://mirror.centos.org/centos/$releasever/contrib/$basearch/

gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-6

priority=2

#在[base]、[updates]、[extras]组下面添加priority=1，在[centosplus]、[contrib]组下面添加priority=2

3.安装EPEL源。

安装EPEL可采用两种方式：

第一种采用yum方式：

[root@Cacti ~]# yum install epel-release

…..

第二种方式: 采用rpm命令安装

[root@Cacti tools]# cat /etc/redhat-release #查看操作系统版本

CentOS release 6.8 (Final)

[root@Cacti tools]# rpm -qa epel-release

epel-release-6-8.noarch

[root@Cacti tools]# rpm �Ce epel-release #卸载

[root@Cacti tools]# rpm -ivhepel-release-6-8.noarch.rpm #找对应的操作系统版本安装

warning: epel-release-6-8.noarch.rpm:Header V3 RSA/SHA256 Signature,key ID 0608b895: NOKEY

Preparing...########################################### [100%]

1:epel-release########################################### [100%]

另一种方式下载对应系统的最新包，例如：CentOS6.0

#wget http://mirrors.ustc.edu.cn/epel/epel-release-latest-6.noarch.rpm

#rpm -ivh epel-release-latest-6.noarch.rpm

[root@Cacti ~]# yum clean all && yum makecache #生成缓存

Loaded plugins: fastestmirror

Determining fastest mirrors

epel/Metalink |4.7 kB 00:00

*base: mirrors.163.com

* epel: mirrors.ustc.edu.cn

*extras: mirrors.163.com

*updates: mirrors.163.com

……

[root@Cacti yum.repos.d]# vi/etc/yum.repos.d/epel.repo

[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

gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-EPEL-6

priority=11 #修改epel yum源优先级，priority=11

4.安装Atomic源。

[root@Cacti tools]# wgethttp://www.atomicorp.com/installers/atomic

[root@Cacti tools]# sh ./atomic

#vi /etc/yum.repos.d/atomic.repo #修改atomic yum源优先级，priority=14

[atomic]

name = CentOS /Red Hat Enterprise Linux $releasever - atomic

mirrorlist =http://updates.atomicorp.com/channels/mirrorlist/atomic/centos-$rel

easever-$basearch

enabled = 1

protect = 0

gpgkey =file:///etc/pki/rpm-gpg/RPM-GPG-KEY.art.txt

file:///etc/pki/rpm-gpg/RPM-GPG-KEY.atomicorp.txt

gpgcheck = 1

priority=14

备注：priority的优先级为1到99，设置为1即优先级最高，1-10为系统保留，第三方yum源的优先级从11-99

[root@Cacti ~]# yum clean all && yum makecache #生成缓存

原文链接：https://www.f2er.com/centos/376816.html