{"id":1838,"date":"2021-08-19T12:18:03","date_gmt":"2021-08-19T06:48:03","guid":{"rendered":"https:\/\/coimbatorewebhosting.com\/blog\/?p=1838"},"modified":"2021-08-19T12:28:43","modified_gmt":"2021-08-19T06:58:43","slug":"how-to-find-and-kill-all-zombie-processes-in-linux","status":"publish","type":"post","link":"https:\/\/coimbatorewebhosting.com\/blog\/how-to-find-and-kill-all-zombie-processes-in-linux\/","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

\"How<\/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<\/a> : Click Here<\/p>\n","protected":false},"excerpt":{"rendered":"
How to Find and Kill All Zombie Processes On Unix operating servers, 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. It almost always means that […]<\/p>\n","protected":false},"author":1,"featured_media":1843,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[153,17,3,1],"tags":[],"class_list":["post-1838","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-centos-7-rhel-7","category-general","category-linux","category-latest"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"https:\/\/coimbatorewebhosting.com\/blog\/wp-content\/uploads\/2021\/08\/zombie.png","jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/pa2YU7-tE","_links":{"self":[{"href":"https:\/\/coimbatorewebhosting.com\/blog\/wp-json\/wp\/v2\/posts\/1838","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/coimbatorewebhosting.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/coimbatorewebhosting.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/coimbatorewebhosting.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/coimbatorewebhosting.com\/blog\/wp-json\/wp\/v2\/comments?post=1838"}],"version-history":[{"count":0,"href":"https:\/\/coimbatorewebhosting.com\/blog\/wp-json\/wp\/v2\/posts\/1838\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/coimbatorewebhosting.com\/blog\/wp-json\/wp\/v2\/media\/1843"}],"wp:attachment":[{"href":"https:\/\/coimbatorewebhosting.com\/blog\/wp-json\/wp\/v2\/media?parent=1838"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/coimbatorewebhosting.com\/blog\/wp-json\/wp\/v2\/categories?post=1838"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/coimbatorewebhosting.com\/blog\/wp-json\/wp\/v2\/tags?post=1838"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}