Hello Eileen,
I’ve tested this about a year ago, you just need to get the Cloverleaf media for RedHat and install on your new hardware. You will also need a new license key for the new server. I was able to tar the sites to the new server and use the hcisitepromote utility to restore the old sites on the new server. This is all well documented with the release notes.
Good luck!
Michael Walcheski
Application Integration Manager
Medisys Health Network
Jamaica Hospital Medical Center
Informatics Department, Epic
Phone 718.206.5972