How to remove strange return-commands ?

[Martin Horoba]

Hi,

I want to get some files from noEmacs-windows-editors into Linux GNU
Emacs Editor.

But you cannot work because of "strange" return-commands from windows
in these files (->  ^M ).

How it's possible to remove/replace these commands with Emacs or any
other tools in Unix-Systems ?
(with the Emacs-replace-function you cannot find ^M)

Thanks for Help,
        Martin