kil user process

[TheDash]

can someone tell how to boot/logout a user from a system (as root?)

who -u gives
pts/7 Jul 13 14:10 old 526 100.1000.10000.1000

But when I "kill 526" it says process doesn't exist

 

[KenCunningham]

Get the PID using ps -ef | grep <user> and take the second column. Then kill it gracefully if you can - only resort to kill -9 as a last resort.

 

[iribach]

man kill
you are missing an option (signal to send)

 

[TheDash]

Thanks. I tried all of these before ...

kill -9 pid
kill pid
kill -KILL pid

It gave the same message "process doesn't exist" each time.
What could be the reason? who -u still shows the user.

 

[KenCunningham]

Does ps -ef | grep 526 show anything - perhaps that it's a defunct process? If that's the case they are notoriously difficult to kill short of a reboot. They don't however, take much in respect of system resources unless there are lots (and lots) of them.

 

[TheDash]

Hi,

I tried it ps -ef | grep 526 doesn't show anything. What could be happening? Is it possible at this stage?

 

[iribach]

accept it: proc 526 is not running!
/usr/proc/bin/ptree will confirm it.