CentOS:
[jachee@jachee:~]
[00:12:29] > ls -l $(which vi)
ls: cannot access alias: No such file or directory
ls: cannot access vi='vim': No such file or directory
-rwxr-xr-x. 1 root root 2294208 Oct 30 2018 /usr/bin/vim
[jachee@jachee:~]
[00:12:53] 2 > which vi
alias vi='vim'
/usr/bin/vim
Homebrew:
[jachee@gyrate:~]
[00:14:15] ▷ ls -l $(which vi)
lrwxr-xr-x 1 jachee admin 29 Aug 6 11:14 /usr/local/bin/vi -> ../Cellar/vim/8.1.1800/bin/vi
[jachee@gyrate:~]
[00:14:28] ▷ ls -l /usr/local/Cellar/vim/8.1.1800/bin/vi
lrwxr-xr-x 1 jachee staff 3 Aug 3 12:17 /usr/local/Cellar/vim/8.1.1800/bin/vi -> vim
No-Homebrew Catalina:
[jacobachee@jachee-mbp15:~]
[00:17:24] ► ls -l $(which vi)
lrwxr-xr-x 1 root wheel 3 Nov 19 11:46 /usr/bin/vi -> vim
Raspbian: [jachee@mmmmpi:~] [23:10:54] ▷ ls -l $(which vi) lrwxrwxrwx 1 root root 20 Sep 3 2016 /usr/bin/vi -> /etc/alternatives/vi
[jachee@mmmmpi:~] [23:11:11] ▷ ls -l /etc/alternatives/vi lrwxrwxrwx 1 root root 18 Sep 9 2016 /etc/alternatives/vi -> /usr/bin/vim.basic
CentOS: [jachee@jachee:~] [00:12:29] > ls -l $(which vi) ls: cannot access alias: No such file or directory ls: cannot access vi='vim': No such file or directory -rwxr-xr-x. 1 root root 2294208 Oct 30 2018 /usr/bin/vim
[jachee@jachee:~] [00:12:53] 2 > which vi alias vi='vim' /usr/bin/vim
Homebrew: [jachee@gyrate:~] [00:14:15] ▷ ls -l $(which vi) lrwxr-xr-x 1 jachee admin 29 Aug 6 11:14 /usr/local/bin/vi -> ../Cellar/vim/8.1.1800/bin/vi
[jachee@gyrate:~] [00:14:28] ▷ ls -l /usr/local/Cellar/vim/8.1.1800/bin/vi lrwxr-xr-x 1 jachee staff 3 Aug 3 12:17 /usr/local/Cellar/vim/8.1.1800/bin/vi -> vim
No-Homebrew Catalina: [jacobachee@jachee-mbp15:~] [00:17:24] ► ls -l $(which vi) lrwxr-xr-x 1 root wheel 3 Nov 19 11:46 /usr/bin/vi -> vim
Edit - for an actually-readable version of the above, see https://gist.github.com/jachee/eaa8610312ebd7723fc76e8d71da7...