The #! is commonly called a "shebang" and it tells the computer how to run a script. You'll also see lots of shell-scripts with #!/bin/sh or #!/bin/bash. So, /usr/bin/perl is your Perl interpreter and it is run and given the file to execute.
The #! is commonly called a "shebang" and it tells the computer how to run a script. You'll also see lots of shell-scripts with #!/bin/sh or #!/bin/bash. So, /usr/bin/perl is your Perl interpreter and it is run and given the file to execute.