TLDR
Enter a command. For example: x11vnc, nitrogen, dpkg, ddcutil.

wall

 
Write a message on the terminals of users currently logged in. More information: https://manned.org/wall.
 
  • Send a message:
     
    echo "{{message}}" | wall
     
  • Send a message from a file:
     
    wall {{file}}
     
  • Send a message with timeout (default 300):
     
    wall -t {{seconds}} {{file}}

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