grep配合netstat

来源：unp实验1-多进程记录

关键： nestat 参数 –pna ,如果只是-a 好像不行。

小结0：配合grep的重定向，请给出尽量多的参数

小结：先开服务器，再开客户端，其中发起端c01,能检索到。呵呵。这是三次握手的原理

代码解释：

os66@liuliu-os66:~/Downloads/fscap$ netstat -pna|grep C01
(Not all processes could be identified, non-owned process info
will not be shown, you would have to be root to see it all.)
tcp        0      0 127.0.0.1:39877         127.0.0.1:9877          ESTABLISHED 15335/C01     

 
os66@liuliu-os66:~/Downloads/fscap$ netstat -pna|grep S01
(Not all processes could be identified, non-owned process info
will not be shown, you would have to be root to see it all.)

附其他参数测试：

小结：netstat给出的参数越多越有利有grep的速度。当然这是筛选的结果。 没有使用参数，或者使用-p,或者-a都会等待很长时间

os66@liuliu-os66:~/Downloads/fscap$ netstat |grep C01
^C
os66@liuliu-os66:~/Downloads/fscap$ netstat -p|grep C01
(Not all processes could be identified, non-owned process info
will not be shown, you would have to be root to see it all.)
^C
os66@liuliu-os66:~/Downloads/fscap$ netstat -pn|grep C01
(Not all processes could be identified, non-owned process info
will not be shown, you would have to be root to see it all.)
tcp        0      0 127.0.0.1:39877         127.0.0.1:9877          ESTABLISHED 15335/C01      
os66@liuliu-os66:~/Downloads/fscap$