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                            nmap命令是一款開放源代碼的網絡探測和安全審核工具，它的設計目標是快速地掃描大型網絡。
~~~
yum install -y nmap 
~~~

~~~
-sP：ping掃描，僅發現目標主機是否存活； 
-ps：發送同步（SYN）報文； 
-PU：發送udp ping； 
-PE：強制執行直接的ICMPping； 
-PB：默認模式，可以使用ICMPping和TCPping；

-p 端口
~~~
~~~
nmap -sP 192.168.8.0/24

Starting Nmap 4.11 ( http://www.insecure.org/nmap/ ) at 2016-06-15 23:43 CST
Host 192.168.8.10 appears to be up.
MAC Address: 00:23:CD:8C:45:64 (Unknown)
Host 192.168.8.41 appears to be up.
~~~
                    
                
        
                
            
        
                
    
                
    
                
        
                
    
                

                







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