ping linux

　　

1. -b allow ping a broadcast address
   windows and linux 默认都不会对广播ping做回应,可用 echo 0 > /proc/sys/net/ipv4/icmp_echo_ignore_broadcasts来使Linux对其响应
   

    

    

    

    

2. -i  interval
   

   1) default 1 second
   2) flood mode: not to wait

    

3. mdev : mean deviation    icmp包之rtt偏离平均值程度,越大意味着网络越不稳定
   
   
4. -I : 指定网卡或IP
   
   
5. -w  总的超时时间
   
   
6. -W time to wait for a response,The option affects only timeout in absence of any response,otherwise ping waits for two RTTs
   

    

    默认情况下,没有返回时,ping 等待了10s
   

    

    加入-W参数,使ping最多等待2s