一，安装CentOS yum源优先级插件yum优先级
yum install yum优先级 ＃输入y安装
二，设置CentOS yum源的优先级为最高
cd /etc/yum.repos.d/＃ 进入yum源目录
vi CentOS- Base.repo ＃在[base]，[更新]，[extras]组下面添加priority = 1，在[centosplus]，[contrib]组下面添加priority = 2
############ ######################################### ##
[基]
名称= CentOS- $ releasever - 基本
它的镜像就是列表= HTTP://mirrorlist.centos.org/释放= $ releasever与ARCH = $ basearch及回购= OS
＃的的BaseURL = HTTP://mirror.centos.org/centos/ $ releasever /操作系统/ $ basearch /
gpgcheck = 1
gpgkey =文件：/// etc / pki / rpm-gpg / RPM-GPG-KEY-CentOS-6
优先级= 1
[更新]
名称= CentOS- $ releasever - 更新
镜像列表= HTTP：//mirrorlist.centos.org/释放= $ releasever与ARCH = $ basearch及回购=更新
＃的BaseURL = HTTP：//mirror.centos.org/centos/$releasever / updates / $ basearch /
gpgcheck = 1
gpgkey = file：/// etc / pki / rpm-gpg / RPM-GPG-KEY-CentOS-6
优先级= 1
[额外]
名称= CentOS- $ releasever - 额外
镜像列表= HTTP：//mirrorlist.centos.org/释放= $ releasever与ARCH = $ basearch及回购=额外
＃的BaseURL = HTTP：//mirror.centos.org/centos/$releasever / extras / $ basearch /
gpgcheck = 1
gpgkey = file：/// etc / pki / rpm-gpg / RPM-GPG-KEY-CentOS-6
优先级= 1
[centosplus]
名称= CentOS- $ releasever - 加
镜像列表= HTTP：//mirrorlist.centos.org/释放= $ releasever与ARCH = $ basearch及回购= centosplus
＃的BaseURL = HTTP：//mirror.centos.org/centos/$releasever / centosplus / $ basearch /
gpgcheck = 1
启用= 0
gpgkey =文件：/// etc / pki / rpm-gpg / RPM-GPG-KEY-CentOS-6
优先级= 2
[contrib]
name = CentOS- $ releasever - Contrib
mirrorlist = http：//mirrorlist.centos.org/？release = $ releasever＆arch = $ basearch＆repo = contrib
＃baseurl = http：//mirror.centos.org/centos/$releasever / contrib / $ basearch /
gpgcheck = 1
启用= 0
gpgkey =文件：/// etc / pki / rpm-gpg / RPM-GPG-KEY-CentOS-6
优先级= 2
########### ############################################### ##
备注：priority的优先级为1至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
三，安装epel yum源
rpm -ivh http： //mirrors.ustc.edu.cn/fedora/epel/6/x86_64/epel-release-6-7.noarch.rpm
rpm --import / etc / pki / rpm-gpg / RPM-GPG-KEY-EPEL- 6
vi /etc/yum.repos.d/epel.repo＃ 修改epel yum源优先级，priority = 11
############################ ####################################
[EPEL]
NAME =额外 的软件包 为 企业 Linux的 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 =文件：/// etc / pki / rpm-gpg / RPM-GPG-KEY-EPEL-6
优先级= 11
##################### ###########################################
四，安装rpmforge yum源
rpm -ivh http://pkgs./rpmforge-release/rpmforge-release-0.5.2-2.el6.rf.i686.rpm
wget http://dag./rpm/packages/RPM-GPG-KEY.dag.txt
rpm --import RPM-GPG-KEY.dag.txt
rpm -ivh rpmforge-release-0.5.2-2。 el6.rf.i686.rpm
vi /etc/yum.repos.d/rpmforge.repo＃ 修改rpmforge yum源优先级，priority = 12
#################### ##############################################
[rpmforge软件]
名称 = RHEL $ releasever - RPMforge.net - dag
baseurl = http://apt./redhat/el6/en/$basearch/rpmforge
镜像列表 = http://apt./redhat/el6/en/ mirrors-rpmforge
＃镜像列表 =
启用 = 1
保护 = 0
gpgkey =
gpgcheck = 1
优先级= 12
################################### ###############################
五，安装rpmfusion yum源
rpm -ivh http://download1./free/ el / updates / testing / 6 / i386 / rpmfusion-free-release-6-0.1.noarch.rpm
vi /etc/yum.repos.d/rpmfusion-free-updates-testing.repo＃ 修改rpmfusion yum源优先级，优先级= 13
################################### ##################
[rpmfusion-free-updates-testing]
name = RPM Fusion for EL 6 - 免费 - 测试 更新
＃baseurl =
http：//download1./free/el/updates/testing/6/$basearch/mirrorlist=http：//mirrors./mirrorlist？repo = free-el -updates-testing-6＆arch = $ basearch
enabled = 1
gpgcheck = 1
gpgkey = file：/// etc / pki / rpm-gpg / RPM-GPG-KEY-rpmfusion-free-el-6
priority = 13
#### ############################################### ###########
六，安装atomic yum源
wget http://www./installers/atomic＃ 下载
sh ./atomic＃ 安装
vi /etc/yum.repos.d/atomic .repo ＃修改atomy yum源优先级，priority = 14
############################################### ############
[原子]
名称 = 的CentOS / 红 红帽 企业 Linux的 $ releasever - atomicrocketturtle.com
镜像列表 = http://www./mirrorlist/atomic/centos-6-$ basearch
#mirrorlist = http://www./channels/atomic/centos/6/mirrors-atomic已
启用 = 1
优先级 = 1
保护 = 0
gpgkey =
gpgcheck = 1
优先级= 14
############################################### ###########
七，更新yum后端
yum check-update
八，安装iftop
yum install iftop
至此，CentOS 第三方yum源配置完成，现在你可以用yum命令安装自己需要的软件了！比如百胜 安装 nginx的，百胜 更新 PHP等安装或者升级软件包。
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扩展阅读：
在使用yum update php命令升级php的同时ERROR 2002 （HY000）： 无法 通过 套接字 连接 到 本地 MySQL 服务器 ，因此，mysql也被升级到了最新版，升级好之后重启mysql，有可能会出现下面
的错误信息，导致mysql启动失败。
'/var/lib/mysql/mysql.sock'（2 ）
解决方法（切记，操作前，一定备份mysql数据库）：
rm -fr / var / lib / mysql / * ＃删除目录
rm / var / lock / subsys / mysqld ＃删除目录
killall mysqld ＃结束mysql进程
服务 mysqld start ＃启动mysql
/etc/rc.d/init.d/mysqld status ＃查看mysql状态
mysql_secure_installation ＃重置Mysql数据库密码
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