ping命令
ping命令的参数选项及说明
测试到目标主机的网络连通性
[root@cs6 ~]# ping www.wenyule.top PING www.wenyule.top (213.232.105.22) 56(84) bytes of data. #<==显示ping的域名及其IP地址,发送的是56字节的数据。 64 bytes from 213.232.105.22: icmp_seq=1 ttl=128 time=202 ms #<=从目标主机收到的数据是64字节,iemp_seq是收到包的序列号,ttl是数据包的生存期,time是时延。 64 bytes from 213.232.105.22: icmp_seq=2 ttl=128 time=201 ms 64 bytes from 213.232.105.22: icmp_seq=3 ttl=128 time=201 ms 64 bytes from 213.232.105.22: icmp_seq=4 ttl=128 time=205 ms ^C --- www.wenyule.top ping statistics --- 5 packets transmitted, 4 received, 20% packet loss, time 4062ms rtt min/avg/max/mdev = 201.004/202.597/205.910/1.999 ms #<==rtt 是传输的时间延迟。min/avg/max/mdev==>最小/平均/最大/算术平均差。
使用ping参数的不同组合的例子
[root@cs6 ~]# ping -c 3 -i 3 -s 1024 -t 255 www.wenyule.top PING www.wenyule.top (213.232.105.22) 1024(1052) bytes of data. 1032 bytes from 213.232.105.22: icmp_seq=1 ttl=128 time=207 ms 1032 bytes from 213.232.105.22: icmp_seq=2 ttl=128 time=202 ms 1032 bytes from 213.232.105.22: icmp_seq=3 ttl=128 time=202 ms --- www.wenyule.top ping statistics --- 3 packets transmitted, 3 received, 0% packet loss, time 6209ms rtt min/avg/max/mdev = 202.300/204.142/207.412/2.347 ms
-c 3:发送3次ICMP包。