在CentOS6.x或CentOS7.x上安装EPEL Repo,Extra Packages for Enterprise Linux (EPEL)
Error: Cannot retrieve metalink for repository: epel. Please verify its path and try again
Repo
repository，资源库，源的意思。RHEL EPEL(Extra Packages for Enterprise Linux) Repo是Linux发行版中最大的软件仓库之一，免费，丰富的软件包更新。
介绍：
http://fedoraproject.org/wiki/EPEL
Support Red Hat Enterprise Linux (RHEL), CentOS and Scientific Linux (SL), Oracle Linux (OL).
安装步骤：
CentOS 6.x
sudo rpm --import http://dl.fedoraproject.org/pub/epel/RPM-GPG-KEY-EPEL-6 //导入GPG key
yum-config-manager epel | grep gpgkey
gpgkey = /etc/pki/rpm-gpg/RPM-GPG-KEY-EPEL-6 //检查GPG key
sudo rpm -Uvh http://dl.fedoraproject.org/pub/epel/epel-release-latest-6.noarch.rpm //安装
CentOS 7.x
sudo rpm --import http://dl.fedoraproject.org/pub/epel/RPM-GPG-KEY-EPEL-7 //导入GPG key
yum-config-manager epel | grep gpgkey
gpgkey = /etc/pki/rpm-gpg/RPM-GPG-KEY-EPEL-7 //检查GPG key
sudo rpm -Uvh http://dl.fedoraproject.org/pub/epel/epel-release-latest-7.noarch.rpm //安装
或者
yum install epel-release -y
NOTE for CentOS users
You can install EPEL by running yum install epel-release. The package is included in the CentOS Extras repository, enabled by default.
可能出现的问题：
运行yum报错：
Error: Cannot retrieve metalink for repository: epel. Please verify its path and try again
解决办法：
vim /etc/yum.repos.d/epel.repo
编辑[epel]下的baseurl前的#号去掉，mirrorlist前添加#号。
正确配置如下：
[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
再运行
yum clean all
yum makecache
yum repolist //确认EPEL状态
repo id repo name status
base CentOS-6 - Base 6518
epel Extra Packages for Enterprise Linux 6 - x86_64 11628
extras CentOS-6 - Extras 38
rpmforge RHEL 6 - RPMforge.net - dag 245
updates CentOS-6 - Updates 1199
repolist: 19628
完成
另外：有的时候EPEL需要手动开启
yum install yum* //为了安装yum-config-manager
或者
yum install yum-utils.noarch
sudo yum-config-manager --enable epel //开启EPEL Repository，有的时候无法自动开启
或者
sudo yum-config-manager --enable epel*
epel Extra Packages for Enterprise Linux 6 - x86_64 11,746
epel-debuginfo Extra Packages for Enterprise Linux 6 - x86_64 - D 2,207
epel-source Extra Packages for Enterprise Linux 6 - x86_64 - S 0
epel-testing Extra Packages for Enterprise Linux 6 - Testing - 950
epel-testing-debuginfo Extra Packages for Enterprise Linux 6 - Testing - 78
epel-testing-source Extra Packages for Enterprise Linux 6 - Testing - 0
