lala@kubu:~$ sudo apt install gvim
[sudo] password for lala:
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
Package gvim is a virtual package provided by:
vim-gtk3 2:8.2.2434-3ubuntu3.2
vim-athena 2:8.2.2434-3ubuntu3.2
You should explicitly select one to install.
E: Package 'gvim' has no installation candidate
lala@kubu:~$ which vi
/usr/bin/vi
lala@kubu:~$ file /usr/bin/vi
/usr/bin/vi: symbolic link to /etc/alternatives/vi
lala@kubu:~$ file /etc/alternatives/vi
/etc/alternatives/vi: symbolic link to /usr/bin/vim.gtk3
lala@kubu:~$