To avoid that problem, you'll want to set -o noclobber in scripts or, better, for your login shell, and let it be inherited by subshells, including those that run your shell scripts.

Check out the Shell Style Guide on GitHub to get started. Also, Apple has a document on shell script security that's also well worth a read. Be careful out there! A little extra time making sure your ...

The Test-Path cmdlet can keep you from going bonkers by offering a little bit of script pre-error-handling.