Brain Ashburn, my colleague in the Atlanta Red Hat office, introduced me to the xclip utility today. It copies output from the command line and puts it into x-windows.
For example, to copy the current directory :
pwd | xclip -i -sel "clip"
There are of course more useful things that can be piped to it. To try it out create a file, add some text and :
cat newfile | xclip -i -sel "clip"
Its available through yum :
sudo yum install xclip