1. Using system system($command,@arguments);

For example:

system("sh","script.sh","--help" );

system("sh script.sh --help");

System will execute the $command with
@arguments and return to your script when finished. You may check $!
for certain errors passed to the OS by the external application. Read
the documentation for system for the nuances of how varIoUs
invocations are slightly different.

2. Using exec

This is very similar to the use of 07001,but it will
terminate your script upon execution. Again,read the documentation
for 07002 for more.

3. Using backticks or qx//

my $output = `script.sh --option`;

my $output = qx/script.sh --option/;

The backtick operator and it’s equivalent qx// excute the command and options inside the operator and
return that commands output to STDOUT when it finishes.

There are also ways to run external applications through creative use of 07003,but this is advanced use; read the documentation for more.