change default python version
sudo update-alternatives --config pythonchange default python version
sudo update-alternatives --config pythonSet default python version linux
update-alternatives --list python
# update-alternatives: error: no alternatives for python
# means not set yet
update-alternatives --install /usr/bin/python python /usr/bin/python3 1
# update-alternatives: using /usr/bin/python2.7 to provide /usr/bin/python (python) in auto mode
update-alternatives --install /usr/bin/python python /usr/bin/python3.8 2
# update-alternatives: using /usr/bin/python3.4 to provide /usr/bin/python (python) in auto mode
update-alternatives --install /usr/bin/python python /usr/bin/python3.9 3
# update-alternatives: using /usr/bin/python2.7 to provide /usr/bin/python (python) in auto mode
# Higher last param will be auto selected
update-alternatives --list python
# shows all
python --version
# Python 3.9 or whichever highest
update-alternatives --config python
# This will let you change vers from a menuCopyright © 2021 Codeinu
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