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RHEL 7 can be installed using VNC - not sure if this works with ClearOS, I don't have a copy...
https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/7/html/Installation_Guide/sect-vnc-installations-anaconda-modes.html
and
https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/7/html/Installation_Guide/chap-anaconda-boot-options.html -