How to set up and run the code for "stlink" zip file from github in ubuntu 20.04

After downloading and extracting the zip file, please consult the README. It says, in part:

Linux

We recommend to install stlink-tools from the package repository of the used distribution:

  • Ubuntu Linux: (Link)

I suggest that you open a terminal and do:

sudo apt update
sudo apt install stlink-tools

You should be all set.