如何通过别名在 Linux 中将默认的 python3 设置为 python3.9？

Question

I'm a newcomer to the world of Linux. I've installed a distro in a virtual machine (elive, to be precise) and I'm starting to play around a bit. I've built from source the latest python version (3.9 at the time of writing). Now I'm trying to set it as the default python3 version (at the moment the default version is python3.2). It suffices to be set this way just for my personal shell. I've read about aliases, so I tried to use them to set the default python version. I wrote in the.bashrc the following line:

alias python3='python3.9'

I also tried:

alias python3=python3.9
alias python3="/usr/local/lib/python3.9"

I've also read that you might need to login again, so I tried it but with no results. What am I doing wrong?

Thank you for your help in advance.

Answer 1

If you want better is update alternatives with this you can change default editor etc.

How to select which version of python I am running on Linux? - Stack Overflow

How to change from default to alternative Python version on Debian Linux - LinuxConfig.org

or you can try this Gui version

sudo apt install galternatives