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Editor to share with you how to view and kill zombies in the Linux system. I hope you will get something after reading this article. Let's discuss it together.

A zombie process is a process that has been terminated but whose parent process has not been processed to obtain information about the terminated process. This process is called a "zombie process" (zombie)

First of all, we can use the top command to check whether the server currently has zombie processes. In the following figure, you can see a hint of the number of zombie processes. If the number is greater than 0, it means that there are zombie processes on the server.

Next, we use the ps and grep commands to find the zombie process ps-A-ostat,ppid,pid,cmd | grep-e'^ [Zz] 'command note:

The-A parameter lists all processes

-o Custom output field We set the display field to four parameters: stat (status), ppid (process parent id), pid (process id) and cmd (command)

Because the process with state z or Z is a zombie process, we use grep to grab the stat state as the zZ process

The running results are as follows

Z 12334 12339 / path/cmd

At this point, we can use kill-HUP 12339 to kill the zombie process.

After running, you can run ps-A-ostat,ppid,pid,cmd | grep-e'^ [Zz] 'again to confirm whether to kill the zombie process.

If the kill child process is invalid, you can try to kill its parent process to solve the problem. For example, in the above example, the parent process pid is 12334, then we will run kill-HUP 12334 to solve the problem.

Check the current zombie process information ps-ef | grep defunct | grep-v grep | wc-l view the first two lines of TOP top | head-2 directly kill the process ps-ef | grep defunct | grep-v grep | awk'{print "kill-18" $3}'

After reading this article, I believe you have a certain understanding of "how to view and kill zombies in the Linux system". If you want to know more about it, you are welcome to follow the industry information channel. Thank you for reading!

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