[Vi] change the file type between dos and unix

source: https://kb.iu.edu/d/acux

 

There are two methods for converting the file type between dos and unix.

 

1) vim, use :set ff=unix to convert to Unix; use :set ff=dos to convert to Windows.

 

2) show ^M and remove it:

:e ++ff=unix

It force-set the fileformat as unix without actually changing the contents.

So vim reads it like a Unix file, sees the CR characters as extra and displays them as ^M.

 

In vi, you can remove carriage return ( ^M ) characters with the following command:

:1,$s/^M//g

To input the ^M character, press Ctrl-v, and then press Enter or return.