mons

Enable only the primary monitor

$ mons -o

$ mons -s

$ mons -d

$ mons -m

$ mons -e right

$ mons

$ mons -O [id]

mons [-o] [-s] [-d] [-m] [-e side] [-O id] [-S id1,id2:pos] [--dpi value]

mons is a POSIX-compliant shell script for managing multi-monitor displays on X Window System. It simplifies switching between display configurations without extensive dependencies.
The tool wraps xrandr to provide intuitive commands for common dual-monitor setups: primary only, secondary only, duplicate, mirror, and extend modes. It supports daemon mode for automatic display management when monitors are connected or disconnected.

-o

Enable primary monitor only

Enable secondary monitor only

Duplicate primary monitor output onto secondary

Mirror primary display onto secondary

Extend primary monitor; side: top, left, right, bottom

Cycle through display modes sequentially

Enable specific monitor by identifier

Enable two specific monitors; pos: R (right), T (top)

Daemon mode; auto-enable display on monitor changes

Execute custom script on monitor count changes

Set display DPI (0-27432 range)

Designate primary output monitor

Display help

Show version

Requires X Window System and xrandr. Does not work with Wayland compositors. Limited to configurations that xrandr supports. The secondary monitor is determined by connection order; use -O or -S for explicit control with multiple monitors.

mons was developed by Thomas� Venturini (Ventto) as a lightweight alternative to graphical display configuration tools. It provides a minimal, scriptable interface for common multi-monitor operations.

xrandr(1), autorandr(1), arandr(1)