http://www.perlmonks.org?node_id=468573


in reply to Re^2: /usr/bin/perl -w?
in thread /usr/bin/perl -w?

And Unix commands in general, too! Because of shell design and such, typing rm * in a directory which contains a file named -rf could delete everything (except the file -rf)! You should do rm -- * instead. I have actually been bitten by this once or twice, but luckily not by -rf but something more mundane.