xdotool lets you programatically (or manually) simulate keyboard input and mouse activity,
move and resize windows, etc. It does this using X11's XTEST extension and other Xlib
functions.

   There is some support for Extended Window Manager Hints (aka EWMH or NetWM).  See the
   "EXTENDED WINDOW MANAGER HINTS" section for more information.

What is xdotool?

This tool lets you simulate keyboard input and mouse activity, move and resize windows, etc. It does this using X11’s XTEST extension and other Xlib functions.

Additionally, you can search for windows and move, resize, hide, and modify window properties like the title. If your window manager supports it, you can use xdotool to switch desktops, move windows between desktops, and change the number of desktops.