This is part 2 of the previous video. It shows you a modern mainframe (emulated) running Ubuntu 20 with tests of mysql database, samba file sharing and apache web server.
The mainframe is not dead. It can be used for modern applications.
See part 1 where I installed this system: https://youtu.be/TnNw0FzJRqM
Video is copyright protected (c) 2020 Philip Yuson
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https://www.youtube.com/watch?v=DM17xvkibkk