For example, is this a server or a desktop system and perhaps any more information about the specific Linux distribution you are using. I would also be curious to know whether the Python available ...

Pyenv is a command line utility to manage multiple Python versions on Linux. Pyenv is used to install, uninstall and switch to different versions of Python.

If you need to run multiple versions of Ruby or Python on the same computer, you can use scoop reset to switch between versions. If you're familiar with rbenv or RVM this is roughly similar, although ...