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Created June 18, 2022 11:53
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Ubuntu Notes
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ubuntu-notes.md

Ubuntu Notes

Install Python 2 on Ubuntu 20.04

sudo apt install python2

python2 -V

Easily switch from Python 2 to Python 3 or vice-versa on Ubuntu 20.04

  1. Check the python versions available on your Ubuntu system.
ls /usr/bin/python*
  1. Check if you already have some python alternatives configured.
sudo update-alternatives --list python
  1. Set the desired Python alternatives. In this example, we are setting Python2 and Python3 alternatives. Execute the following commands:
sudo update-alternatives --install /usr/bin/python python /usr/bin/python2 1
sudo update-alternatives --install /usr/bin/python python /usr/bin/python3 2
  1. Confirm that the alternatives are ready to be used:
sudo update-alternatives --list python
  1. Change to the desired alternative python version.
sudo update-alternatives --config python
  1. Verify the new python version:
python -V
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