CentOS 7/8: Solution to yum error "Could not resolve host: mirrorlist.centos.org; Unknown error" (valid in 2024)

yum install -y yum-utils # Install yum-utils package yum install -y yum-utils # Loaded plugins: fastestmirror # Determining fastest mirrors # Could not retrieve mirrorlist http://mirrorlist.centos.org?arch=x86_64&release=7&repo=sclo-rh error was # 1...