由于一些原因，比如需要检查网络之间是否存在掉包等问题，会长时间去ping一个地址，由于会输出大量的信息而且最好要有时间戳，因此我们可以使用简单的几个shell命令组合就可以实现：长时间ping一个地址，记录每次ping的时间戳，并输出到文本保存，另外我们还可以将这个动作放到后台去执行，以免登陆注销之后被中断。
首先是长时间ping，这个非常简单，使用参数-c即可：
[root@ www ~]# ping 192.168.2.1 -c 10
PING 192.168.2.1 (192.168.2.1) 56(84) bytes of data.
64 bytes from 192.168.2.1: icmp_seq=1 ttl=64 time=0.638 ms
64 bytes from 192.168.2.1: icmp_seq=2 ttl=64 time=0.341 ms
64 bytes from 192.168.2.1: icmp_seq=3 ttl=64 time=0.291 ms
64 bytes from 192.168.2.1: icmp_seq=4 ttl=64 time=0.259 ms
64 bytes from 192.168.2.1: icmp_seq=5 ttl=64 time=0.338 ms
64 bytes from 192.168.2.1: icmp_seq=6 ttl=64 time=0.339 ms
64 bytes from 192.168.2.1: icmp_seq=7 ttl=64 time=0.243 ms
64 bytes from 192.168.2.1: icmp_seq=8 ttl=64 time=0.234 ms
64 bytes from 192.168.2.1: icmp_seq=9 ttl=64 time=0.333 ms
64 bytes from 192.168.2.1: icmp_seq=10 ttl=64 time=0.284 ms
--- 192.168.2.1 ping statistics ---
10 packets transmitted, 10 received, 0% packet loss, time 9002ms
rtt min/avg/max/mdev = 0.234/0.330/0.638/0.109 ms
上面我们ping了10次，每次的时间1秒，因此比如你要ping连天那么就是60*60*24*2=172800。接下来是加时间戳：
root@ www ~]# ping 192.168.2.1 -c 10 | awk '{ print $0"\t" strftime("%H:%M:%S",systime()) } '
PING 192.168.2.1 (192.168.2.1) 56(84) bytes of data. 10:30:21
64 bytes from 192.168.2.1: icmp_seq=1 ttl=64 time=0.436 ms 10:30:21
64 bytes from 192.168.2.1: icmp_seq=2 ttl=64 time=0.343 ms 10:30:22
64 bytes from 192.168.2.1: icmp_seq=3 ttl=64 time=0.368 ms 10:30:23
64 bytes from 192.168.2.1: icmp_seq=4 ttl=64 time=0.280 ms 10:30:24
64 bytes from 192.168.2.1: icmp_seq=5 ttl=64 time=0.308 ms 10:30:25
64 bytes from 192.168.2.1: icmp_seq=6 ttl=64 time=0.360 ms 10:30:26
64 bytes from 192.168.2.1: icmp_seq=7 ttl=64 time=0.319 ms 10:30:27
64 bytes from 192.168.2.1: icmp_seq=8 ttl=64 time=0.274 ms 10:30:28
64 bytes from 192.168.2.1: icmp_seq=9 ttl=64 time=0.360 ms 10:30:29
64 bytes from 192.168.2.1: icmp_seq=10 ttl=64 time=0.265 ms 10:30:30
10:30:30
--- 192.168.2.1 ping statistics --- 10:30:30
10 packets transmitted, 10 received, 0% packet loss, time 9000ms 10:30:30
rtt min/avg/max/mdev = 0.265/0.331/0.436/0.052 ms 10:30:30
然后我们把信息输出到文本：
[root@ www ~]# ping 192.168.2.1 -c 10 | awk '{ print $0"\t" strftime("%H:%M:%S",systime()) } '>ping.log
[root@ www~]# cat ping.log
PING 192.168.2.1 (192.168.2.1) 56(84) bytes of data. 10:37:23
64 bytes from 192.168.2.1: icmp_seq=1 ttl=64 time=0.398 ms 10:37:23
64 bytes from 192.168.2.1: icmp_seq=2 ttl=64 time=0.288 ms 10:37:24
64 bytes from 192.168.2.1: icmp_seq=3 ttl=64 time=0.465 ms 10:37:25
64 bytes from 192.168.2.1: icmp_seq=4 ttl=64 time=0.310 ms 10:37:26
64 bytes from 192.168.2.1: icmp_seq=5 ttl=64 time=0.275 ms 10:37:27
64 bytes from 192.168.2.1: icmp_seq=6 ttl=64 time=0.247 ms 10:37:28
64 bytes from 192.168.2.1: icmp_seq=7 ttl=64 time=0.339 ms 10:37:29
64 bytes from 192.168.2.1: icmp_seq=8 ttl=64 time=0.270 ms 10:37:30
64 bytes from 192.168.2.1: icmp_seq=9 ttl=64 time=0.297 ms 10:37:31
64 bytes from 192.168.2.1: icmp_seq=10 ttl=64 time=0.289 ms 10:37:32
10:37:32
--- 192.168.2.1 ping statistics --- 10:37:32
10 packets transmitted, 10 received, 0% packet loss, time 9000ms 10:37:32
rtt min/avg/max/mdev = 0.247/0.317/0.465/0.067 ms 10:37:32
最后，我们需要把任务放到后台去：
[root@ www ~]# nohup ping 192.168.2.1 -c 10 | awk '{ print $0"\t" strftime("%H:%M:%S",systime()) } '>ping1.log &
[1] 2616
[root@ www~]# ls
anaconda-ks.cfg check1.sh Desktop eygle.com httpd login pass.conf ping1.log ping.log test1.sh test1.sh1
[root@ www ~]# cat ping1.log
PING 192.168.2.1 (192.168.2.1) 56(84) bytes of data. 10:40:22
64 bytes from 192.168.2.1: icmp_seq=1 ttl=64 time=0.373 ms 10:40:22
64 bytes from 192.168.2.1: icmp_seq=2 ttl=64 time=0.343 ms 10:40:23
64 bytes from 192.168.2.1: icmp_seq=3 ttl=64 time=0.335 ms 10:40:24
64 bytes from 192.168.2.1: icmp_seq=4 ttl=64 time=0.299 ms 10:40:25
64 bytes from 192.168.2.1: icmp_seq=5 ttl=64 time=0.372 ms 10:40:26
64 bytes from 192.168.2.1: icmp_seq=6 ttl=64 time=0.236 ms 10:40:27
64 bytes from 192.168.2.1: icmp_seq=7 ttl=64 time=0.394 ms 10:40:28
64 bytes from 192.168.2.1: icmp_seq=8 ttl=64 time=0.317 ms 10:40:29
64 bytes from 192.168.2.1: icmp_seq=9 ttl=64 time=0.490 ms 10:40:30
64 bytes from 192.168.2.1: icmp_seq=10 ttl=64 time=1.65 ms 10:40:31
10:40:31
--- 192.168.2.1 ping statistics --- 10:40:31
10 packets transmitted, 10 received, 0% packet loss, time 9001ms 10:40:31
rtt min/avg/max/mdev = 0.236/0.480/1.650/0.395 ms 10:40:31
-The End-