Install xbindkeys by entering the following commands in the terminal:
sudo apt update sudo apt install xbindkeys
Description:
Associate a combination of keys or mouse buttons with a shell command
xbindkeys is a program that allows you to launch shell commands with your keyboard or your mouse under the X Window System. It links commands to keys or mouse buttons, using a configuration file. It's independent of the window manager and can capture all keyboard keys (ex: Power, Wake...). . It optionally supports a guile-based configuration file layout, which enables you to access all xbindkeys internals, so you can have key combinations, double clicks or timed double clicks take actions. Also all functions that work in guile will work for xbindkeys.
Homepage: http://www.nongnu.org/xbindkeys/
Version: 1.8.6-1build1
Section: universe/x11