In this tutorial, we will show you how to manually update system packages on CentOS 7. The same instructions apply for CentOS 6. Prerequisites # To install and update packages you need to be logged in as root or a user with sudo privileges. Updating Packages on CentOS # RPM is a packaging system used by Red Hat and its derivatives such as CentOS.Live USB CentOS 7.0 Gnome (CD) ( CentOS-7.0-1406-x86_64-livecd.iso )
Make sure you are up to date already: sudo yum -y upgrade. Then add EPEL: sudo yum -y install epel-release. The download the repo file from the link below, and sudo copy it into /etc/yum.repos.d/ If you already have GNOME installed, perform another upgrade: sudo yum -y upgrade (Do NOT do an update. Do an upgrade, instead.