root@localhost ~]# nmap -sT -O localhost
Starting Nmap 6.45 ( http://nmap.org ) at 2014-08-01 17:50 NZST
Nmap scan report for localhost (127.0.0.1)
Host is up (0.000054s latency).
rDNS record for 127.0.0.1: localhost.localdomain
Not shown: 996 closed ports
PORT     STATE SERVICE
22/tcp   open  ssh
111/tcp  open  rpcbind
631/tcp  open  ipp
9091/tcp open  xmltec-xmlmail
No exact OS matches for host (If you know what OS is running on it, see http://nmap.org/submit/ ).
TCP/IP fingerprint:
OS://Snip//
OS://Snip//
OS://Snip//
OS://Snip//
OS://Snip//
OS://Snip//
OS://Snip//
OS://Snip//
OS://Snip//
OS://Snip//
Network Distance: 0 hops
OS detection performed. Please report any incorrect results at http://nmap.org/submit/ .
Nmap done: 1 IP address (1 host up) scanned in 12.44 seconds
[root@localhost ~]#