This is really becoming a plague. Cyber-hipsters and their use of the # symbol to "tag content". Listen, you "not even able to do "hello world!" in bash" IT illiterates, leave the symbol to the people that really have a use for it. If you really have to tag content of something you wrote it is nothing but a sign that you wrote something that makes no sense at all, additionally it points to a delusional "my life is one big twitter feed" attitude.

#!/usr/bin/perl

That's better.