$ update-alternatives --display editor
editor - auto mode
link best version is /bin/nano
link currently points to /bin/nano
link editor is /usr/bin/editor
slave editor.1.gz is /usr/share/man/man1/editor.1.gz
slave editor.fr.1.gz is /usr/share/man/fr/man1/editor.1.gz
slave editor.it.1.gz is /usr/share/man/it/man1/editor.1.gz
slave editor.ja.1.gz is /usr/share/man/ja/man1/editor.1.gz
slave editor.pl.1.gz is /usr/share/man/pl/man1/editor.1.gz
slave editor.ru.1.gz is /usr/share/man/ru/man1/editor.1.gz
/bin/ed - priority -100
slave editor.1.gz: /usr/share/man/man1/ed.1.gz
/bin/nano - priority 40
slave editor.1.gz: /usr/share/man/man1/nano.1.gz
/usr/bin/vim.basic - priority 30
slave editor.1.gz: /usr/share/man/man1/vim.1.gz
slave editor.fr.1.gz: /usr/share/man/fr/man1/vim.1.gz
slave editor.it.1.gz: /usr/share/man/it/man1/vim.1.gz
slave editor.ja.1.gz: /usr/share/man/ja/man1/vim.1.gz
slave editor.pl.1.gz: /usr/share/man/pl/man1/vim.1.gz
slave editor.ru.1.gz: /usr/share/man/ru/man1/vim.1.gz
/usr/bin/vim.tiny - priority 15
slave editor.1.gz: /usr/share/man/man1/vim.1.gz
slave editor.fr.1.gz: /usr/share/man/fr/man1/vim.1.gz
slave editor.it.1.gz: /usr/share/man/it/man1/vim.1.gz
slave editor.ja.1.gz: /usr/share/man/ja/man1/vim.1.gz
slave editor.pl.1.gz: /usr/share/man/pl/man1/vim.1.gz
slave editor.ru.1.gz: /usr/share/man/ru/man1/vim.1.gz
$ update-alternatives --config editor
There are 4 choices for the alternative editor (providing /usr/bin/editor).
Selection Path Priority Status
0 /bin/nano 40 auto mode
1 /bin/ed -100 manual mode
2 /bin/nano 40 manual mode
3 /usr/bin/vim.basic 30 manual mode
4 /usr/bin/vim.tiny 15 manual mode
Press to keep the current choice[*], or type selection number: 3
update-alternatives: using /usr/bin/vim.basic to provide /usr/bin/editor (editor) in manual mode
run ‘editor’ and it should open vim