Fix error EPEL Repo “Cannot retrieve metalink for repository” on CentOS

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When you installed EPEL Repository on CentOS, you use “yum” to install some application but the issue appears (Cannot retrieve metalink for repository: epel) :

# yum install mysql-server

Loaded plugins: fastestmirror

Determining fastest mirrors

Error: Cannot retrieve metalink for repository: epel. Please verify its path and try again

Reason:
– Default in EPEL Repo is configured to connect to EPEL Server by HTTPS Connection, however in some cases the information Certificate Chain/Root Certificate on CentOS doesnt have good-new Certificates so you cannot connect to EPEL Server for retrieving metalink.

Fix error “Cannot retrieve metalink for repository: epel” on CentOS

Method 1: update ca-certificates

– You need to update your ca-certificates on CentOS.

# yum clean all
# yum --disablerepo=epel reinstall ca-certificates -y
# yum --disablerepo=epel update ca-certificate -y

– Then retry to use “yum” command to operate what you want.

Method 2: change the way “yum” will connect to EPEL Repo

– You need to change the method “yum” will connect to EPEL to retrive data, change from “https” -> “http” in file configuration of EPEL “epel.repo“.

# sed -i "s/mirrorlist=https/mirrorlist=http/" /etc/yum.repos.d/epel.repo

– Do edit manually file ‘epel.repo’ with changing the value ‘mirrorlist=https‘ -> ‘mirrorlist=http‘.

# vi /etc/yum.repos.d/epel.repo
mirrorlist=https://mirrors.fedoraproject.org/metalink?repo=epel-6&arch=$basearch

to

mirrorlist=http://mirrors.fedoraproject.org/metalink?repo=epel-6&arch=$basearch

 
– Then retry to use “yum” command to operate what you want.

Above is two basic way to fix error “Cannot retrieve metalink for repository: epel” on CentOS

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