Drush is included in the EPEL repository so you can use the yum command to install it. Do the following:
- Enable the EPEL repository if it isn’t already. Instructions for enabling it are available here.
- Install the Drush package with the command: sudo yum install drush
- If you want to know what version of drush you are installing, do this command first: yum info drush
- Done. Drush is now available globally for all users of the system.