Quote Originally Posted by maks View Post
nmap -sP -n {ip address}
-sP: Ping Scan - go no further than determining if host is online
-n/-R: Never do DNS resolution/Always resolve [default: sometimes]

jon@pronbox:~$ nmap -sP -n wroth.org

Starting Nmap 5.00 ( http://nmap.org ) at 2013-07-28 17:02 CDT
Host 64.62.205.225 is up (0.054s latency).
Nmap done: 1 IP address (1 host up) scanned in 0.15 seconds