How to unset environment variable
bash-3.2$ echo $EDITOR vim bash-3.2$ unset EDITOR bash-3.2$ echo $EDITOR
Downloads $ echo $EDITOR vim Downloads $ set -e EDITOR Downloads $ echo $EDITOR
A common use case is that editing the
.profile does not remove environment variables that have been commented out, so they need to be erased manually. Perhaps a fancy script could parse the
.profile and find commented out settings, then unset them.