OS X.5 / X.6 - Remove resourcefork-files on a non-HFS-volume

Working on a non-HFS-formatted volume will cause in a lot of files containing the resourceforks (e.g. for the file foo.bar a 2nd file ._foo.bar will be created). To remove them all recursive on a Unix-based OS, go to the desired directory and type this little line in a shell: