agama, that code foreach file (${*:q}) would fix the issue with the spaces but what if the file extension had the special character "$" in it. For example, what if the file name was foo$e.b$l and I wanted to rewrite it to foo$e.ball using the same script...

Example: ./chExt.sh 'ball' 'foo$e.b$l'

This command would not create the file "foo$e.ball"

Any help with this? Must be one little tweek of the code somewhere.