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{"id":847,"date":"2018-06-11T16:54:43","date_gmt":"2018-06-11T11:24:43","guid":{"rendered":"http:\/\/www.webhostingchennai.co.in\/blog\/?p=847"},"modified":"2019-03-11T12:19:04","modified_gmt":"2019-03-11T06:49:04","slug":"how-to-find-and-kill-all-zombie-processes","status":"publish","type":"post","link":"https:\/\/www.webhostingchennai.co.in\/blog\/how-to-find-and-kill-all-zombie-processes\/","title":{"rendered":"How to Find and Kill All Zombie Processes in Linux"},"content":{"rendered":"

How to Find and Kill All Zombie Processes<\/strong><\/span><\/h4>\n
On Unix operating servers<\/a>, a zombie process or defunct process is a process that has completed execution but still has an entry in the process table, allowing the process that started it to read its exit status.<\/p>\n
<\/a><\/p>\n
It almost always means that the parent is still around. If the parent exited, the child would be orphaned and re-parented to init, which would immediately perform the wait(). In other words, they should go away once the parent process is done.
\nA zombie process\u00a0doesn\u2019t react to signals<\/strong>.<\/p>\n
1. How can I get the Zombie from process list\u2026?<\/strong>
\nIts very simple. You can find out Zombie process with the following way:<\/p>\n
# ps aux |grep \"defunct\"\r\n\r\nuser1 3366 0.0 0.0 0 0 ? Z 07:34 0:00 [chromium-browse]\r\nuser1 3435 0.0 0.0 0 0 ? Z 07:44 0:19 [chromium-browse]\r\nuser1 3722 0.0 0.0 0 0 ? Z 08:21 0:00 [pidgin] defunct\r\nuser1 4287 0.1 0.0 0 0 ? Z 09:26 0:38 [chromium-browse]\r\nuser1 5378 0.1 0.0 0 0 ? Z 11:24 0:15 [chromium-browse] defunct<\/pre>\n
# ps aux |grep Z\r\n\r\nUSER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND\r\nuser1 3366 0.0 0.0 0 0 ? Z 07:34 0:00 [chromium-browse] \r\nuser1 3435 0.0 0.0 0 0 ? Z 07:44 0:19 [chromium-browse] \r\nuser1 3722 0.0 0.0 0 0 ? Z 08:21 0:00 [pidgin] \r\nuser1 4287 0.1 0.0 0 0 ? Z 09:26 0:38 [chromium-browse] \r\nuser1 5378 0.1 0.0 0 0 ? Z 11:24 0:15 [chromium-browse]<\/pre>\n
2. How many Zombie process running on your server?<\/strong><\/p>\n
# ps aux | awk {'print $8'}|grep -c Z\r\n5<\/pre>\n# ps aux | awk '{ print $8 \" \" $2 }' | grep -wc Z\r\n5<\/pre>\n
# ps aux | awk {'print $8'}|grep Z|wc -l\r\n5<\/pre>\n
3. List the PID of Zombie ?<\/strong><\/p>\n
# ps aux | awk '{ print $8 \" \" $2 }' | grep -w Z\r\nZ 3366\r\nZ 3435\r\nZ 3722\r\nZ 4287\r\nZ 5378<\/pre>\n
In order to kill these processes, you need to find the parent process first.<\/p>\n
# pstree -paul<\/pre>\n
This will show the pid of the of the parent of the zombie process. Now you need to kill the parent process.<\/p>\n[root@webhostingchennai]# kill -9<\/p>\n
Hope this article helps you. Please share you valuable comments to improve us.<\/p>\n
For changing the SSH port number : Click Here<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"
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