unknown: list before sort/uniq unknown: 168.100.189.2 unknown: 168.100.189.2 unknown: 168.100.189.1 unknown: 168.100.189.3 unknown: 168.100.189.3 unknown: 168.100.189.3 unknown: 168.100.189.4 unknown: 168.100.189.1 unknown: 168.100.189.4 unknown: list after sort/uniq unknown: 168.100.189.1 unknown: 168.100.189.2 unknown: 168.100.189.3 unknown: 168.100.189.4