From UABgrid Documentation
If you are experiencing disconnects with the Cheaha head node due to flaky network connections or you want to maintain a shell context over time, then the screen command may be helpful.
Screen allows you to create terminal sessions on the head node that you can disconnect and reconnect across individual ssh sessions. For example, if you start a qlogin session within one of these terminals then your qlogin session will last as long as the time slice you have requested or until you explicitly exit the session.
The screen users manual is helpful http://www.gnu.org/software/screen/manual/screen.html.
Note that if you are using X window tunneling with your qlogin session this won't work without extra manual effort for a qlogin session within screen.
This page is a stub, please help expand it.