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Last active February 6, 2019 14:54
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python_update-alternative.md

Change python version system-wide

To change python version system-wide we can use update-alternatives command. Logged in as a root user, first list all available python alternatives:

# apt-get update
# apt-get install python3.6
# update-alternatives --list python
update-alternatives: error: no alternatives for python

The above error message means that no python alternatives has been recognized by update-alternatives command. For this reason we need to update our alternatives table and include both python2.7 and python3.6:

# update-alternatives --install /usr/bin/python python /usr/bin/python2.7 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/python3.6 10
update-alternatives: using /usr/bin/python3.4 to provide /usr/bin/python (python) in auto mode
# curl https://bootstrap.pypa.io/get-pip.py | python
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