每天学一个 Linux 命令（62）：ping

ping [options] destination
ping -6 [options] destination

-c<完成次数>  #指定要求回应的次数
-f  #最大极限检测
-i<间隔秒数>  #指定收发信息的间隔时间
-n  #只输出数值
-p<范本样式>  #设置填满数据包的范本样式
-q  #不输出执行过程信息，开头和结尾的相关信息除外
-r  #忽略普通的 Routing Table，直接将数据包送到远端主机上
-R  #记录路由过程
-s<数据包大小>  #设置数据包的大小
-t<存活数值>   #设置存活数值TTL的大小
-v   #详细输出执行过程信息

[root@centos7 ~]# ping www.baidu.com
PING www.a.shifen.com (36.152.44.95) 56(84) bytes of data.
64 bytes from 36.152.44.95 (36.152.44.95): icmp_seq=1 ttl=56 time=10.5 ms
64 bytes from 36.152.44.95 (36.152.44.95): icmp_seq=2 ttl=56 time=11.8 ms
64 bytes from 36.152.44.95 (36.152.44.95): icmp_seq=3 ttl=56 time=10.7 ms
^C
--- www.a.shifen.com ping statistics ---
7 packets transmitted, 7 received, 0% packet loss, time 6095ms
rtt min/avg/max/mdev = 10.588/11.512/12.007/0.546 ms

[root@centos7 ~]# ping -n www.baidu.com
PING www.a.shifen.com (36.152.44.96) 56(84) bytes of data.
64 bytes from 36.152.44.96: icmp_seq=1 ttl=56 time=13.6 ms
64 bytes from 36.152.44.96: icmp_seq=2 ttl=56 time=14.0 ms
^C
--- www.a.shifen.com ping statistics ---
6 packets transmitted, 6 received, 0% packet loss, time 5032ms
rtt min/avg/max/mdev = 13.616/14.373/14.933/0.442 ms

[root@centos7 ~]# ping -c 2 www.baidu.com
PING www.a.shifen.com (36.152.44.96) 56(84) bytes of data.
64 bytes from 36.152.44.96 (36.152.44.96): icmp_seq=1 ttl=56 time=14.0 ms
64 bytes from 36.152.44.96 (36.152.44.96): icmp_seq=2 ttl=56 time=14.4 ms

--- www.a.shifen.com ping statistics ---
2 packets transmitted, 2 received, 0% packet loss, time 1013ms
rtt min/avg/max/mdev = 14.086/14.257/14.428/0.171 ms

[root@centos7 ~]# ping -c 10 -f www.baidu.com
PING www.a.shifen.com (36.152.44.96) 56(84) bytes of data.
  
--- www.a.shifen.com ping statistics ---
10 packets transmitted, 10 received, 0% packet loss, time 110ms
rtt min/avg/max/mdev = 13.368/13.587/13.871/0.142 ms, pipe 2, ipg/ewma 12.279/13.609 ms