Hide

What's this?

commandlinefu.com is the place to record those command-line gems that you return to again and again.

Delete that bloated snippets file you've been using and share your personal repository with the world. That way others can gain from your CLI wisdom and you from theirs too. All commands can be commented on, discussed and voted up or down.


If you have a new feature suggestion or find a bug, please get in touch via http://commandlinefu.uservoice.com/

Get involved!

You can sign-in using OpenID credentials, or register a traditional username and password.

First-time OpenID users will be automatically assigned a username which can be changed after signing in.

Hide

Stay in the loop…

Follow the Tweets.

Every new command is wrapped in a tweet and posted to Twitter. Following the stream is a great way of staying abreast of the latest commands. For the more discerning, there are Twitter accounts for commands that get a minimum of 3 and 10 votes - that way only the great commands get tweeted.

» http://twitter.com/commandlinefu
» http://twitter.com/commandlinefu3
» http://twitter.com/commandlinefu10

Subscribe to the feeds.

Use your favourite RSS aggregator to stay in touch with the latest commands. There are feeds mirroring the 3 Twitter streams as well as for virtually every other subset (users, tags, functions,…):

Subscribe to the feed for:

Hide

News

2011-03-12 - Confoo 2011 presentation
Slides are available from the commandlinefu presentation at Confoo 2011: http://presentations.codeinthehole.com/confoo2011/
2011-01-04 - Moderation now required for new commands
To try and put and end to the spamming, new commands require moderation before they will appear on the site.
2010-12-27 - Apologies for not banning the trolls sooner
Have been away from the interwebs over Christmas. Will be more vigilant henceforth.
2010-09-24 - OAuth and pagination problems fixed
Apologies for the delay in getting Twitter's OAuth supported. Annoying pagination gremlin also fixed.
Hide

Tags

Hide

Functions

Kill all Zombie processes (Guaranteed!)

Terminal - Kill all Zombie processes (Guaranteed!)
kill -9 `ps -xaw -o state -o ppid | grep Z | grep -v PID | awk '{print $2}'`
2010-10-27 07:29:14
User: khashmeshab
Functions: awk grep kill
10
Kill all Zombie processes (Guaranteed!)

It identifies the parents of the Zombie processes and kill them. So the new parent of orphan Zombies will be the Init process and he is already waiting for reaping them. Be careful! It may also kill your useful processes just because they are not taking care and waiting for their children (bad parents!).

Alternatives

There are 4 alternatives - vote for the best!

Terminal - Alternatives
kill -9 `ps -xaw -o state -o pid | grep Z | grep -v PID | awk '{print $2}'`
2010-10-27 07:19:52
User: khashmeshab
Functions: awk grep kill
1

Tested on FreeBSD 8.1 and CSH. The scripts works correctly but the Zombies do not die! I hope it will run and function as expected in Linux and others.

kill -9 `ps xawo state=,pid=|sed -n 's/Z //p'`
2010-10-27 07:38:07
User: AskApache
Functions: kill sed
0

just a leaner, smaller version. Love the original idea!

ps -xaw -o state,ppid | grep Z | grep -v PID | awk '{ print $2 }' | xargs kill -9
2013-01-09 04:21:54
User: terrywang
Functions: awk grep kill ps xargs
-4

Did some research and found the previous command wrong, we don't kill a zombie but its parent. Just made some modifcation to khashmeshab's command.

Know a better way?

If you can do better, submit your command here.

What others think

nice.. great idea

Comment by AskApache 213 weeks ago

the ppid version is a bit too dangerous for me though..

Comment by AskApache 213 weeks ago

@AskApache: Try it once. You will see it is not so dangerous. It even killed one of SSHD daemons in my remote server but I'm still connected to it without any problem!

Comment by khashmeshab 213 weeks ago

Didnt work got this error not sure what it means

http://paste2.org/p/1058232

Comment by Bonster 213 weeks ago

@Bonster: What OS do you use? (uname -a)

Comment by khashmeshab 212 weeks and 6 days ago

On Ubuntu 11.10, I had to omit the 1st ' - ' :

kill -9 `ps -xaw -o state -o ppid | grep Z | grep -v PID | awk '{print $2}'`

Warning: bad syntax, perhaps a bogus '-'? See /usr/share/doc/procps-3.2.7/FAQ

this works:

kill -9 `ps xaw -o state -o ppid | grep Z | grep -v PID | awk '{print $2}'`
Comment by cyba84 152 weeks ago

I don't think mindlessly killing parent processes just to get rid of zombies is the way to go. This one-liner is certainly correct (as opposed to the original submission) but the big picture of this problem is still way off.

Comment by wejn 97 weeks and 5 days ago

Your point of view

You must be signed in to comment.

Related sites and podcasts