Nmap 可​以​从 shell 提​示​下​运​行​。​在 shell 提​示​下​，键​入 nmap 命​令​，随​后​是​要​扫​描​的​主​机​名​或 IP 地​址​。

        nmap foo.example.com
      

扫​描​的​结​果​（可​能​会​花​几​分​钟​时​间​，根​据​主​机​所​在​位​置​而​定​）和​以​下​相​似​：

        Starting nmap V. 3.50 ( www.insecure.org/nmap/ ) Interesting ports on localhost.localdomain (127.0.0.1): (The 1591 ports scanned but not shown below are in state: closed) Port State Service 22/tcp open ssh 25/tcp open smtp 111/tcp open sunrpc 443/tcp open https 515/tcp open printer 950/tcp open oftep-rpc 6000/tcp open X11 Nmap run completed -- 1 IP address (1 host up) scanned in 71.825 seconds
      

Nmap 测​试​常​用​的​网​络​通​信​端​口​上​的​监​听​或​等​待​服​务​。​这​些​信​息​对​于​想​要​关​闭​不​必​要​服​务​的​管​理​员​来​说​很​有​帮​助​。

关​于​使​用 Nmap 的​更​多​信​息​，请​参​阅​以​下 URL 的​官​方​网​站​：

http://www.insecure.org/