nmap - Check most commonly used Ports with TCP Syn

sudo nmap -sT 192.168.1.69

Result:

Starting Nmap 6.40 ( http://nmap.org ) at 2016-07-08 01:32 BST
Nmap scan report for peter-laptop-1 (192.168.1.69)
Host is up (0.00023s 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 0.05 seconds