Install mon prebuilt binaries for Linux/Mac using npm.
mon is a simple single-process process monitoring program written in C.
Download and install the mon binary globally to symlink it into your PATH:
npm install -g mon-prebuilt
If that command fails with an EACCESS error you may have to run it again with sudo:
sudo npm install -g mon-prebuilt
Now you can just run mon to run mon:
mon