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 system$ perl my_commands.pl 
 hello!

=item *

Make an executable script (note where the semi-colon and >> symbol are used)

 system$ echo '#!/usr/bin/env perl' > my_script.pl
 system$ echo 'print "hello!\n"; ' >> my_script.pl
 system$ echo 'exit;' >> my_script.pl
 system$ chmod +x my_script.pl
 system$ cat my_script.pl

 #!/usr/bin/env perl
 print "hello!\n";
 exit;

 system$ ./my_script.pl
 hello!

=back