How to convert a text file's line termination from Windows/DOS to Unix? [duplicate]

Possible Duplicate:
Convert CRLF’s to line feeds on Linux

I have several scripts that produce a /bin/sh^M bad interpreter error message when they are run. I believe this is because they are formatted with the Windows/DOS line termination instead of the line termination expected by Unix/Linux (Ubuntu 9.04 for an embedded system in my case).

Is there an easy way to convert text files from the Windows/DOS format to the Unix format in a Linux environment?

Multiple choices here:

How do I convert between Unix and Windows text files?

You can use the dos2unix utility for this.

dos2unix winfile.txt unixfile.txt