xdotool

Command-line automation for X11. More information: https://manned.org/xdotool.

• Retrieve the X-Windows window ID of the running Firefox window(s):
  xdotool search --onlyvisible --name {{firefox}}
• Click the right mouse button:
  xdotool click {{3}}
• Get the ID of the currently active window:
  xdotool getactivewindow
• Focus on the window with ID of 12345:
  xdotool windowfocus --sync {{12345}}
• Type a message, with a 500ms delay for each letter:
  xdotool type --delay {{500}} "Hello world"
• Press the enter key:
  xdotool key {{KP_Enter}}