Commands using kill

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.

Cleaned up and silent with &>/dev/null at the end.

Execute commands serially on a list of hosts. Each ssh connection is made in the background so that if, after five seconds, it hasn't closed, it will be killed and the script will go on to the next system.

Maybe there's an easier way to set a timeout in the ssh options...

Kill all processes belonging to a user, with a minimum of resource usage. Great for the times when a user fork-bombs the system and it's difficult to login or run commands.

You can also use gawk:

ps auxww | gawk '/application/' | gawk '/processtobekilled/' | gawk '{print $2}' | grep -v grep | xargs kill -9

Daemontools[1] won't always properly reap it's children. Sometimes when you need to kill the main svscan process, you want to also clean up all of it's children. The way to do that is to send a signal to the entire process group. It is a bit tricky

[1] http://cr.yp.to/daemontools.html

compare to alternative :

- directly tests the -STOP of the process to continue or stop loop,

- background operator should be set (or not) at the call of the function

For extension i suggest a slowPID() based on kill like above and a slowCMD based on killall.

Some IO intensive process make the system unresponsive. This function periodically starts/stops a process, which hopefully releases some resources for other activities.

This function is useful when ionice is not available

defunct processes (zombies) usually have to be killed by killing their parent processes. this command retrieves such zombies and their immediate parents and kills all of the matching processes.

List background jobs, grep their number - not process id - and then kill them

run this in another terminal, were xxxx is the process ID of the running dd process.

the progress will report on the original terminal that you ran dd on

Kills all the threads from the user provided in the WHERE request.

Can be refined through the SQL request, of course, see http://dev.mysql.com/doc/refman/5.1/en/processlist-table.html for the available columns.

This one liner is to kill all google chrome tabs. This works similar to $ killall firefox command which is to kill all firefox processes.

The previously-posted one-liner didn't work for me for whatever reason, so I ended up doing this instead.

# define user pid to kill

PID=httpd ;

# kill all pids

ps aux | grep $PID | grep -v grep | awk '{print $2}' | xargs kill -9

Kill all process that concide whit PATTERN

The other 2 commands that are listed will also kill the egrep process and any libexec processes because the .exe isn't escaped so it is really using . meaning anything containing exe. The command i posted escapes the (dot) in .exe and then filters the actual egrep process so that it doesn't get killed before the other processes being killed. Also added the -9 switch for kill to send sigterm to the processes, in case people are wondering why processes aren't getting killed after running just kill . This should work better for people :)

Occasionally, to force zone updating, cache flush is necessary. This command is better than restart the mydns daemon.

eg:

Already running cmd

Substitution cmd