How to Kill user in Linux

[taslayer]

saw a post where a guy had his server infected with a bunch of perl bots si i figure id help

Well if you want to kill some users process ( in unix/linux hosting server) or if you want to terminate from the shell access then you can use following commands.

If you want the user jason’s process details

ps -aux |grep jason

from the output just kill the process id of that user and that user will be out from the shell without any wall message for him/her.

By other way you can do following.

Task: How to halt/stop user called jason

Type the skill command as follows:
# skill -STOP -u jason

You muse be root to stop other users.
Task: How to resume already halted user called jason

Send CONT single to user jason, type the following command:
# skill -CONT -u jason
Task: How to kill and logout user called jason

You can send KILL single, type the following command:
# skill -KILL -u jason
Task: Kill and logout all users

The ultimate command to kill and logout all users, type the following command:
# skill -KILL -v /dev/pts/*

Please note that send users warning message or logout notice using wall command to avoid data loss.

Enjoy..

[sam]

You can also try this one

1) ps -ef | grep "postgres"
see which users are connectioned and than.
2) pkill -f 'postgres: postgres <databasename>';

its more safer i suppose than kill -9

[carl]

To kill all processes for a single user, use the following command:

pkill -u username

[Rodricks]

How do I Know who is logged in to kill them?

[bod-jack]

just type "who" at the console

[George]

You can also check the current logged in user name as well as user local machine ip address or network name in your server by using following command

root@yourserverhostname]# w
USER TTY FROM LOGIN@ IDLE JCPU PCPU WHAT
test1 pts/2 ipaddress 19:34 45:47 0.01s 0.01s sshd: test1
test2 pts/4 ipaddress 20:04 0.00s 0.05s 0.01s sshd: test2