Install System Monitor Stacer

Install Stacer on Ubuntu 20.o4

Refer: https://linuxconfig.org/how-to-install-stacer-on-ubuntu-20-04-focal-fossa-linux-desktop

$ sudo apt install stacer
$ stacer

Install gdebi which is a lightweight *.deb Installer

We will be using the gdebi tool to install Stacer DEB file package. To install gdebi on your Ubuntu 18.04 system, open up terminal and enter:

You should be able to install this via the software store, and then you can just right-click and choose other applicatino to install a *.deb through the file manager.

Command Line Version
$ sudo apt install gdebi-core

Download Stacer

Navigate to Stacer download page and download the latest Stacer DEB package to your home directory. For example in this guide we will be installing Stacer 1.0.9. Let's start by downloading stacer via the wget command:

$ cd /tmp
$ wget https://jaist.dl.sourceforge.net/project/stacer/v1.0.9/stacer_1.0.9_amd64.deb

The above command downloaded Stacer Debian package into our user home directory.
Install Stacer

What remains is to use the gdebi command to install Stacer:

$ sudo gdebi ~/stacer.deb

Supporting multiple monitors with Macbook Pro

Used thunderbolt adapters to drive two external monitors.  One of them was rotated so there was another tweak necessary to get this to pickup.

Settings, Monitors

Choose: Gather Windows

Multiple windows appear, choose the window/panel with the monitor to rotate, and it should have a rotation option.

Please see attached example.

Rotate external monitor
Rotate external monitor