实验环境：
[root@bogon zhi]# uname -aLinux bogon 2.6.32-642.11.1.el6.i686 #1 SMP Fri Nov 18 18:48:28 UTC 2016 i686 i686 i386 GNU/Linux[root@bogon zhi]# cat /etc/redhat-release CentOS release 6.8 (Final)
一、安装Wget
[root@bogon zhi]# yum install wget已加载插件：fastestmirror, refresh-packagekit设置安装进程Loading mirror speeds from cached hostfile * base: mirror.bit.edu.cn * epel: mirror.lzu.edu.cn * extras: mirrors.btte.net * updates: mirrors.btte.net解决依赖关系--> 执行事务检查---> Package wget.i686 0:1.12-8.el6 will be 安装--> 完成依赖关系计算依赖关系解决================================================================================================================================================================================= 软件包 架构 版本 仓库 大小=================================================================================================================================================================================正在安装: wget i686 1.12-8.el6 base 483 k事务概要=================================================================================================================================================================================Install 1 Package(s)总下载量：483 kInstalled size: 1.8 M确定吗？[y/N]：y下载软件包：wget-1.12-8.el6.i686.rpm | 483 kB 00:00 运行 rpm_check_debug 执行事务测试事务测试成功执行事务 正在安装 : wget-1.12-8.el6.i686 1/1 Verifying : wget-1.12-8.el6.i686 1/1 已安装: wget.i686 0:1.12-8.el6 完毕！
二、下载repel
CentOS6.8_32位epel下载地址：https://mirrors.tuna.tsinghua.edu.cn/epel/6/i386/epel-release-6-8.noarch.rpm
CentOS6.8_64位epel下载地址：https://mirrors.tuna.tsinghua.edu.cn/epel/6Server/x86_64/epel-release-6-8.noarch.rpm
[root@bogon zhi]# wget https://mirrors.tuna.tsinghua.edu.cn/epel/6/i386/epel-release-6-8.noarch.rpm--2016-12-06 01:44:43-- https://mirrors.tuna.tsinghua.edu.cn/epel/6/i386/epel-release-6-8.noarch.rpm正在解析主机 mirrors.tuna.tsinghua.edu.cn... 166.111.206.63, 2402:f000:1:416:166:111:206:63正在连接 mirrors.tuna.tsinghua.edu.cn|166.111.206.63|:443... 已连接。已发出 HTTP 请求，正在等待回应... 200 OK长度：14540 (14K) [application/x-redhat-package-manager]正在保存至: “epel-release-6-8.noarch.rpm.1”100%[=======================================================================================================================================>] 14,540 --.-K/s in 0s 2016-12-06 01:44:43 (262 MB/s) - 已保存 “epel-release-6-8.noarch.rpm.1” [14540/14540])[root@bogon zhi]# lsDesktop Documents Downloads epel-release-6-8.noarch.rpm epel-release-6-8.noarch.rpm.1 Music Pictures Public Templates Videos
三、安装epel
[root@bogon zhi]# rpm -ivh epel-release-6-8.noarch.rpm #安装下载好的epel rpm包Preparing... ########################################### [100%] package epel-release-6-8.noarch is already installed[root@bogon zhi]# rpm -e epel-release-6-8.noarch.rpmerror: package epel-release-6-8.noarch.rpm is not installed[root@bogon zhi]# rpm -e epelerror: package epel is not installed[root@bogon zhi]# rpm -qa |grep epelepel-release-6-8.noarch[root@bogon zhi]# rpm -e epel-release-6-8.noarch[root@bogon zhi]# rpm -ivh epel-release-6-8.noarch.rpmPreparing... ########################################### [100%] 1:epel-release ########################################### [100%][root@bogon zhi]# rpm -qa |grep epel #安装成功 epel-release-6-8.noarch[root@bogon zhi]# ll /etc/yum.repos.d/ #查看额外源 总用量 32-rw-r--r--. 1 root root 1991 5月 19 2016 CentOS-Base.repo-rw-r--r--. 1 root root 647 5月 19 2016 CentOS-Debuginfo.repo-rw-r--r--. 1 root root 289 5月 19 2016 CentOS-fasttrack.repo-rw-r--r--. 1 root root 630 5月 19 2016 CentOS-Media.repo-rw-r--r--. 1 root root 6259 5月 19 2016 CentOS-Vault.repo-rw-r--r--. 1 root root 957 11月 5 2012 epel.repo-rw-r--r--. 1 root root 1056 11月 5 2012 epel-testing.repo[root@bogon zhi]# cat /etc/yum.repos.d/epel.repo [epel]name=Extra Packages for Enterprise Linux 6 - $basearch#baseurl=http://download.fedoraproject.org/pub/epel/6/$basearchmirrorlist=https://mirrors.fedoraproject.org/metalink?repo=epel-6&arch=$basearchfailovermethod=priorityenabled=1gpgcheck=1gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-EPEL-6[epel-debuginfo]name=Extra Packages for Enterprise Linux 6 - $basearch - Debug#baseurl=http://download.fedoraproject.org/pub/epel/6/$basearch/debugmirrorlist=https://mirrors.fedoraproject.org/metalink?repo=epel-debug-6&arch=$basearchfailovermethod=priorityenabled=0gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-EPEL-6gpgcheck=1[epel-source]name=Extra Packages for Enterprise Linux 6 - $basearch - Source#baseurl=http://download.fedoraproject.org/pub/epel/6/SRPMSmirrorlist=https://mirrors.fedoraproject.org/metalink?repo=epel-source-6&arch=$basearchfailovermethod=priorityenabled=0gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-EPEL-6gpgcheck=1