Hello folks…

Today I was trying to install a package on an old CentOS 6 server and got the below error.

Loaded plugins: fastestmirror, presto, security
Setting up Install Process
Determining fastest mirrors
YumRepo Error: All mirror URLs are not using ftp, http[s] or file.
 Eg. Invalid release/repo/arch combination/
removing mirrorlist with no valid mirrors: /var/cache/yum/x86_64/6/base/mirrorlist.txt
Error: Cannot find a valid baseurl for repo: base

Issue

The root cause of this error is, the CentOS 6 is already the end of life (November 30th, 2020) and the repositories are deprecated.

Resolution

The resolution for the issue is to remove the old mirror and baseurl link for the CentOS repos and replace it with the CentOS vualt link.

Backup the old CentOS-Base.repo file

mv /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo-old

Create a new CentOS-Base.repo with the below contents

 vim /etc/yum.repos.d/CentOS-Base.repo

Add the below lines, and save and exit.

[base]
name=CentOS-$releasever - Base
baseurl=https://vault.centos.org/6.10/os/$basearch/
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-6

#released updates
[updates]
name=CentOS-$releasever - Updates
baseurl=https://vault.centos.org/6.10/updates/$basearch/
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-6

[extras]
name=CentOS-$releasever - Extras
baseurl=https://vault.centos.org/6.10/extras/$basearch/
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-6