It is not much fun when your Desktop hangs. The fear of lost work, the inability to continue work, and more. But it need not always be like this. Knowing just a little extra - a few shortcut keyboard combinations and a few commands at the command line - will hopefully get you back up and running quickly. It does not always work, but it works often.
This is a companion discussion topic for the original entry at https://linuxconfig.org/hung-linux-system-how-to-escape-to-the-command-line-and-more