I tried to install stacer Linux system optimizer and monitoring tool in 20.04 using the command
sudo apt install stacer
Reading package lists... Done Building dependency tree Reading state information... Done stacer is already the newest version (1.1.0-3).
The process successfully completed, but I got these results when I tried to start the application from the terminal
$ stacer Command 'stacer' not found, but can be installed with: sudo apt install stacer
and stacer is unable to start.