Shulou(Shulou.com)05/31 Report--

While the endless loop cannot be executed, this article introduces the corresponding analysis and solution in detail for this problem, hoping to help more small partners who want to solve this problem find a simpler and easier way.

This is a very low level error: first look at the name of our script tcpdump.sh, then look at the name of the process we need to kill grep tcpdump,

The grep option filters out the name of the script currently executing, so the script is killed after a round of execution, so there is no endless loop.

The easiest solution is to change the script name OK!!

[root]#bash -x tcpdump.sh

+ int=1

+ one=2

+ (( 1 != 2 ))

+ sleep 1

++ date +%F-%H:%M:%S

+ STIME=2014-08-12-22:11:50

+ sleep 30

+ tcpdump -i eth0 -s 0 -w tcpdum.2014-08-12-22:11:50 host 192.168.1.23

tcpdump: listening on eth0, link-type EN10MB (Ethernet), capture size 65535 bytes

+ ps -ef

+ grep tcpdump

+ grep -v grep

+ awk '{print $2}'

+ xargs kill -9

Killed

About while endless loop can not execute the answer to the question to share here, I hope the above content can have some help to everyone, if you still have a lot of doubts not solved, you can pay attention to the industry information channel to learn more related knowledge.

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