Install jwm by entering the following commands in the terminal:
sudo apt update sudo apt install jwm
Description:
very small lightweight pure X11 window manager with tray and menus
Low resource Window manager ideal for older PCs. It uses a minimum of external libraries, thus very little memory, includes virtual screens, menubar and root-menu popup. . JWM is a window manager for the X11 Window System. JWM is written in C and uses only Xlib and (optionally) the shape extension and libXpm. It can support some MWM, GNOME, and WM Spec hints. The menu configuration files are managed in XML format. . Compared to other light WM, like FVWM or Openbox, the Jwm consumes considerably less memory while providing the same functionality.
Homepage: http://joewing.net/projects/jwm/
Version: 2.3.7-1
Section: universe/x11