Vim converts the end format of the file line

Vim converts the end-to-end format of a file to the end of a line in a different system. Sometimes we write scripts in a windows system or a unix system, and then replace different system Scripts may become invalid. For example, if a python script is used, change the header program path to a unix version #! /Usr/local/bin/python3 still reports an error-bash :. /getUsingWord. py:/usr/local/bin/python3 ^ M: bad interpreter: No such file or directory. It is easier to use vim to modify the line tail format. Unix to windows: w: setl ff = dos (or: setlocal fileformat = dos): wwindows to unix: w: setl ff = unix (or: setlocal fileformat = unix ): w batch conversion: args filenames *. py *. c: argdo setl ff = dos | update