It’s very easy, but also easy to forget how to convert to or from a DOS format file in Unix using “vim” (Vi iMproved),
the Open Source “vi”. If the file is in DOS format and you want to convert to Unix, use the command:
:set ff=unix
note that “ff” is an abreviation for “fileformat” which you can also use.
If the file is Unix and you want to write DOS format, use the following command:
:set ff=dos
In both examples it is assuming you are ESCaped out of edit mode and the leading “:” is required.
Note that the difference between the two formats is that:
DOS format ends each line with a CRLF (carriage-return line-feed) pair.
Unix format ends each line with a simple LF (line feed).
Neither of these forms should be confused with the C language string delimiter ‘NUL’ which is an ASCII “zero”.
That however is an entirely different subject.
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