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

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
• dpkg, dpkg-query, update-alternatives, ar, debsums, dpkg -V, dpkg -S, dpkg -L, dpkg --configure -a, wajig, dpkg -i -E , dpkg --help, dpkg-source-gitarchive

https://linux.die.net/man/8/update-alternatives