sudo nmap -sS 192.168.1.69
result:
Starting Nmap 6.40 ( http://nmap.org ) at 2016-07-08 01:30 BST Nmap scan report for peter-laptop-1 (192.168.1.69) Host is up (0.0000040s latency). Not shown: 997 closed ports PORT STATE SERVICE 80/tcp open http 139/tcp open netbios-ssn 445/tcp open microsoft-ds Nmap done: 1 IP address (1 host up) scanned in 2.44 seconds