How to remove ^M from files

When you transfered a file from Windows to Linux, you have ^ M characters that appear. This is due to the end line characters on Windows (\ r \ n) which are differents from Linux (\ n). There is some tips to remove them.

• On vi, in command mode

:%s/[ctrl+v][ctrl+M]//

• On emacs

M-%

• From the shell, install tofrodos (on Debian):

$ dos2unix file.txt

$ unix2dos file.txt

The second command do the opposite.