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How Check Display Variable Is Set in Linux?

Marcus Vance • • 4 min read
How Check Display Variable Is Set in Linux?
Contents

What is the display variable in Linux?

The DISPLAY variable is used by X11 to identify your display (and keyboard and mouse). Usually it’ll be :0 on a desktop PC, referring to the primary monitor, etc. If you’re using SSH with X forwarding ( ssh -X otherhost ), then it’ll be set to something like localhost:10.0 .

How do I see displays in Linux?

Basic Linux Screen Usage

  1. On the command prompt, type screen .
  2. Run the desired program.
  3. Use the key sequence Ctrl-a + Ctrl-d to detach from the screen session.
  4. Reattach to the screen session by typing screen -r .
Marcus Vance
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Marcus Vance

Marcus Vance is a cybersecurity auditor and technology writer dedicated to educating the public about online safety, data privacy regulations, enterprise security, and emerging cyber threats.