ping命令的功能是用于测试主机间网络连通性,发送出基于ICMP传输协议的数据包,要求对方主机予以回复,若对方主机的网络功能没有问题且防火墙放行流量,则就会回复该信息,我们也就可得知对方主机系统在线并运行正常了。
不过值得我们注意的是Linux与Windows相比有一定差异,Windows系统下的ping命令会发送出去4个请求后自动结束该命令;而Linux系统则不会自动终止,需要用户手动按下组合键“Ctrl+c”才能结束,或是发起命令时加入-c参数限定发送个数。
语法格式:ping [参数] 目标主机
常用参数:
实例参考
测试与指定网站服务器之间的网络连通性(需手动按下“Ctrl+c”组合键结束命令):
[root@liuzhongwei ~]# ping PING . (222.85.26.229) 56(84) bytes of data.64 bytes from (222.85.26.229): icmp_seq=1 ttl=52 time=22.4 ms64 bytes from (222.85.26.229): icmp_seq=2 ttl=52 time=22.4 ms64 bytes from (222.85.26.229): icmp_seq=3 ttl=52 time=22.4 ms64 bytes from (222.85.26.229): icmp_seq=4 ttl=52 time=22.4 ms^C--- . ping statistics ---5 packets transmitted, 5 received, 0% packet loss, time 4005msrtt min/avg/max/mdev = 22.379/22.389/22.400/0.094 ms
测试与指定网站服务器之间的网络连通性,发送请求包限定为4次:
[root@liuzhongwei ~]# ping -c 4 PING (222.85.26.234) 56(84) bytes of data.64 bytes from (222.85.26.234): icmp_seq=1 ttl=52 time=24.7 ms64 bytes from (222.85.26.234): icmp_seq=2 ttl=52 time=24.7 ms64 bytes from (222.85.26.234): icmp_seq=3 ttl=52 time=24.7 ms64 bytes from (222.85.26.234): icmp_seq=4 ttl=52 time=24.7 ms--- . ping statistics ---4 packets transmitted, 4 received, 0% packet loss, time 3005msrtt min/avg/max/mdev = 24.658/24.664/24.673/0.111 ms
测试与指定主机之间的网络连通性,发送3次请求包,每次间隔0.2秒,最长等待时间为3秒:
[root@liuzhongwei ~]# ping -c 3 -i 0.2 -W 3 192.168.10.1064 bytes from 192.168.10.10: icmp_seq=1 ttl=64 time=0.166 ms64 bytes from 192.168.10.10: icmp_seq=2 ttl=64 time=0.060 ms64 bytes from 192.168.10.10: icmp_seq=3 ttl=64 time=0.113 ms--- 192.168.10.10 ping statistics ---3 packets transmitted, 3 received, 0% packet loss, time 410msrtt min/avg/max/mdev = 0.060/0.113/0.166/0.043 ms