How to fix CentOS 5 or 6 error: YumRepo Error: All mirror URLs are not using ftp, http[s] or file Rumi, December 6, 2020July 9, 2021 The error looks like- And here goes the resolution (please carefully update/use the exact CentOS version you are using, in my case it was CentOS 6.9) 1. Go to /etc/yum.repos.d/ directory: # cd /etc/yum.repos.d/ 2. Make copy of original file: # cp CentOS-Base.repo CentOS-Base.repo.old 3. Open and edit file with… Continue Reading