coriander@Anteater1:~$ sudo nmap -sT -O localhost

Starting Nmap 5.21 ( http://nmap.org ) at 2013-04-27 12:34 EDT
Nmap scan report for localhost (127.0.0.1)
Host is up (0.000085s latency).
Not shown: 997 closed ports
PORT     STATE SERVICE
53/tcp   open  domain
631/tcp  open  ipp
9050/tcp open  tor-socks
No exact OS matches for host (If you know what OS is running on it, see http://nmap.org/submit/ ).
TCP/IP fingerprint:
OS:SCAN(V=5.21%D=4/27%OT=53%CT=1%CU=34238%PV=N%DS=0%DC=L%G=Y%TM=517BFE1D%P=
OS:x86_64-unknown-linux-gnu)SEQ(SP=FC%GCD=1%ISR=109%TI=Z%CI=Z%II=I%TS=U)OPS
OS:(O1=M400C%O2=M400C%O3=M400C%O4=M400C%O5=M400C%O6=M400C)WIN(W1=8018%W2=80
OS:18%W3=8018%W4=8018%W5=8018%W6=8018)ECN(R=Y%DF=Y%T=40%W=8018%O=M400C%CC=N
OS:%Q=)T1(R=Y%DF=Y%T=40%S=O%A=S+%F=AS%RD=0%Q=)T2(R=N)T3(R=N)T4(R=Y%DF=Y%T=4
OS:0%W=0%S=A%A=Z%F=R%O=%RD=0%Q=)T5(R=Y%DF=Y%T=40%W=0%S=Z%A=S+%F=AR%O=%RD=0%
OS:Q=)T6(R=Y%DF=Y%T=40%W=0%S=A%A=Z%F=R%O=%RD=0%Q=)T7(R=Y%DF=Y%T=40%W=0%S=Z%
OS:A=S+%F=AR%O=%RD=0%Q=)U1(R=Y%DF=N%T=40%IPL=164%UN=0%RIPL=G%RID=G%RIPCK=G%
OS:RUCK=G%RUD=G)IE(R=Y%DFI=N%T=40%CD=S)

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 11.57 seconds