Ubuntu: Which application does the vi command open?



Question:

When you type vi in the terminal, the following output is shown

~                             VIM - Vi IMproved                                  ~                                                                               ~                               version 7.3.547                                   ~                           by Bram Moolenaar et al.                              ~           Modified by pkg-vim-maintainers@lists.alioth.debian.org               ~                 Vim is open source and freely distributable                     ~                                                                                 ~                        Help poor children in Uganda!                                                                               

So according to this, vi must be launching VIm.
But when you type vim it gives

aditya@aditya-desktop:~$ vim  The program 'vim' can be found in the following packages:   * vim   * vim-gnome   * vim-tiny   * vim-athena   * vim-gtk   * vim-nox  Try: sudo apt-get install <selected package>  

This shows that vim is not installed.
Notably man vi and man vim launch the same man pages.

So what does the vi command actually launch?


Solution:1

It is vim-tiny: "Vi IMproved - enhanced vi editor - compact version".

I did this on 13.10:

user@ubuntu:~$ which vi  /usr/bin/vi  user@ubuntu:~$ which vim  user@ubuntu:~$ ls -l /usr/bin/vi  lrwxrwxrwx 1 root root 20 ago 13  2013 /usr/bin/vi -> /etc/alternatives/vi  user@ubuntu:~$ ls -l /etc/alternatives/vi  lrwxrwxrwx 1 root root 17 dic 20 04:39 /etc/alternatives/vi -> /usr/bin/vim.tiny  user@ubuntu:~$ apt-cache search vim.tiny  vim-common - Vi IMproved - Common files  vim-tiny - Vi IMproved - enhanced vi editor - compact version  user@ubuntu:~$ dpkg --get-selections | grep vim  vim-common                  install  vim-tiny                    install  

As you can see, vim is not installed (empty output), vi is a symlink to /etc/alternatives/vi (see alternatives mechanism), which is a symlink to /usr/bin/vim.tiny, which belongs to package vim-tiny.


Solution:2

If you do type vi:

➜  ~  type vi  vi is /usr/bin/vi  

You will know where's the binary, now if you do:

➜  ~  ls -l /usr/bin/vi   lrwxrwxrwx. 1 root root 20 jun 22  2013 /usr/bin/vi -> /etc/alternatives/vi  

It's provided by the alternative vi, which can be known by:

➜  ~  update-alternatives --display vi  vi - auto mode    link currently points to /usr/bin/vim.basic  /usr/bin/vim.basic - priority 30    slave vi.1.gz: /usr/share/man/man1/vim.1.gz    slave vi.fr.1.gz: /usr/share/man/fr/man1/vim.1.gz    slave vi.it.1.gz: /usr/share/man/it/man1/vim.1.gz    slave vi.ja.1.gz: /usr/share/man/ja/man1/vim.1.gz    slave vi.pl.1.gz: /usr/share/man/pl/man1/vim.1.gz    slave vi.ru.1.gz: /usr/share/man/ru/man1/vim.1.gz  Current 'best' version is '/usr/bin/vim.basic'.  

So, in my case, vi is a symbolic link to the alternative vi which is provided by vim.basic.

You can change which package provided vi if you do sudo update-alternatives --config vi


Solution:3

It's similar to @ignis answer, but i reduced the steps.It only works, if the file is a symbolic link to another.You can get the original file path easily, if it has thousands of symlinks in it's path.

symlnk-->symlnk-->symlnk-->symlnk-->symlnk-->symlnk-->symlnk-->symlnk-->symlnk-->symlnk-->symlnk-->symlnk-->symlnk-->symlnk-->symlnk-->symlnk-->symlnk-->.................-->original file

$ which vi  /usr/bin/vi  $ ls -l $(which vi)  lrwxrwxrwx 1 root root 20 Feb 22 20:14 /usr/bin/vi -> /etc/alternatives/vi  # So /usr/bin/vi is an symlink to /etc/alternatives/vi  $ dpkg -S $(readlink -f $(which vi))      vim-tiny: /usr/bin/vim.tiny  

So vi belongs to the package vim-tiny.

readlink -f gives you the canonical path of the file(Original file path).


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