shell:$ nslookup -timeout=2 -retry=1 'umc-sd.com' ;; communications error to 1.1.1.1#53: timed out Server: 8.8.8.8 Address: 8.8.8.8#53 Non-authoritative answer: Name: umc-sd.com Address: 2.57.91.92 ;; communications error to 1.1.1.1#53: timed out