The Many Uses of Screen

"# Mirror another session: Use screen -x to connect to another existing session, and mirror everything that goes on in it. The existing session will also mirror anything that goes on in the second on. I use this when connecting to the server that runs my email from more than one place at once. It can also be useful for debugging — log in as the user that's having problems, and connect to his or her screen session.

"# Lock the screen: Hit Ctrl-A X to lock the screen; unlock it using your password."

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