update-alternatives

update-alternatives command provided by dpkg package.

• https://manpages.ubuntu.com/manpages/trusty/en/man8/update-alternatives.8.html

• sudo update-alternatives --config editor
• sudo update-alternatives --config vi
• sudo update-alternatives --config java
• sudo update-alternatives --install /usr/bin/python python /usr/bin/python3 10

 update-alternatives --set php /usr/bin/php7.4

sudo update-alternatives --install /usr/bin/python python /usr/bin/python3 10
update-alternatives: using /usr/bin/python3 to provide /usr/bin/python (python) in auto mode

See also

• update-alternatives
• Alternatives, update-alternatives, /etc/alternatives/