Linux ping命令


Linux ping命令用于检测主机。

执行ping指令会使用ICMP传输协议,发出要求回应的信息,若远端主机的网络功能没有问题,就会回应该信息,因而得知该主机运作正常。

语法

ping [-dfnqrRv][-c<完成次数>][-i<间隔秒数>][-I<网络界面>][-l<前置载入>][-p<范本样式>][-s<数据包大小>][-t<存活数值>][主机名称或IP地址]

参数说明

实例

检测是否与主机连通

# ping www.itshubao.com //ping主机
PING aries.m.alikunlun.com (114.80.174.110) 56(84) bytes of data.
64 bytes from 114.80.174.110: icmp_seq=1 ttl=64 time=0.025 ms
64 bytes from 114.80.174.110: icmp_seq=2 ttl=64 time=0.036 ms
64 bytes from 114.80.174.110: icmp_seq=3 ttl=64 time=0.034 ms
64 bytes from 114.80.174.110: icmp_seq=4 ttl=64 time=0.034 ms
64 bytes from 114.80.174.110: icmp_seq=5 ttl=64 time=0.028 ms
64 bytes from 114.80.174.110: icmp_seq=6 ttl=64 time=0.028 ms
64 bytes from 114.80.174.110: icmp_seq=7 ttl=64 time=0.034 ms
64 bytes from 114.80.174.110: icmp_seq=8 ttl=64 time=0.034 ms
64 bytes from 114.80.174.110: icmp_seq=9 ttl=64 time=0.036 ms
64 bytes from 114.80.174.110: icmp_seq=10 ttl=64 time=0.041 ms

--- aries.m.alikunlun.com ping statistics ---
10 packets transmitted, 30 received, 0% packet loss, time 29246ms
rtt min/avg/max/mdev = 0.021/0.035/0.078/0.011 ms

//需要手动终止Ctrl+C

指定接收包的次数

# ping -c 2 www.itshubao.com
PING aries.m.alikunlun.com (114.80.174.120) 56(84) bytes of data.
64 bytes from 114.80.174.120: icmp_seq=1 ttl=54 time=6.18 ms
64 bytes from 114.80.174.120: icmp_seq=2 ttl=54 time=15.4 ms

--- aries.m.alikunlun.com ping statistics ---
2 packets transmitted, 2 received, 0% packet loss, time 1016ms
rtt min/avg/max/mdev = 6.185/10.824/15.464/4.640 ms

//收到两次包后,自动退出

多参数使用

# ping -i 3 -s 1024 -t 255 g.cn //ping主机
PING g.cn (203.208.37.104) 1024(1052) bytes of data.
1032 bytes from bg-in-f104.1e100.net (203.208.37.104): icmp_seq=0 ttl=243 time=62.5 ms
1032 bytes from bg-in-f104.1e100.net (203.208.37.104): icmp_seq=1 ttl=243 time=63.9 ms
1032 bytes from bg-in-f104.1e100.net (203.208.37.104): icmp_seq=2 ttl=243 time=61.9 ms

--- g.cn ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 6001ms
rtt min/avg/max/mdev = 61.959/62.843/63.984/0.894 ms, pipe 2
[root@linux ~]# 

//-i 3 发送周期为 3秒 -s 设置发送包的大小 -t 设置TTL值为 255