Thanks for the replies... really helpful for a noobie like me.

A few questions though...

1. What is the security risk? That another user might be able to access my $home?

2. The line 'fi' in the script, does that terminate 'if-then-else' only or does it stop the script(or any script?). I don't quite feel the flow of the script, but I'll need more practice to do so of course.

No, I don't think I'll want to mess up the /bin, I'll leave it where it is and construct my own bin else where in $home. Because I figure, if I do, then any other account can access it and execute, right? Thanks anyway.