You probably mean $? instead of #?. If you want your script to die on any error, use rather 
if ($? != 0) {
    die "Command failed: $!";
} else {
    print "Command executed successfuly.\n";
}

[download]
But it really depends on the command itself and what exit status it returns in various situations.

In reply to Re: How to determine of script executed correctly? by choroba
in thread How to determine of script executed correctly? by julio_514

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