I recently upgraded my Ubuntu through it's upgrade suggestion from 22.04 to 24.04. when I try python --version I see 3.12.x. But this caused my cqlsh command doesn't work, cause it needs a lower Python version. So I decided to install Python 3.9 and add it as an alternative, change the configuration via sudo update-alternatives --config python3 to use Python 3.9 as default version. But as soon as I did it, the terminal didn't launch. I am not a fan of Python's virtual environments and looking for a way to downgrade the Python 3.12 system wide to something with most compatibility and reliability.. How can I do that? Continue reading...