print system("netstat -an | grep $port"), "\n";

That should be 

system("netstat -an | grep $port");

[download]

or 

print qx{netstat -an | grep $port};

[download]

or 

print grep /$port/, qx{netstat -an};

[download]

In reply to Re^3: How to end "do" with Ctrl-C by ikegami
in thread How to end "do" with Ctrl-C by st_possenti

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