04-02-2004
kill all user processes
Hi there, i've been searching all over and i thought i had understood the way i should go to kill all the processes related to a user. But i'm getting more confused then i was.
By lunch time i have to make a database backup, and for that all the users shoul logout. The problem is that many users don't have the trouble logging out , so before i start the backup i have to kill them all. I've tryed some scripts , and tryed to adapt them to my needs, but all that i found would kill by process name , or using the pid.
I need some script that would ask me for the user to kill , and given the username it would kill all the processes running by tht user.
How can i do this?
i was trying to use this
printf "\n\nUsername to kill?"
read nUsername
[ "$nUsername" ] || exit
ps -u $nUsername | awk -v nUid="nUid" '
{
if ( $1 == nUid )
kill -9 $2
}'
sorry, no great knowleage about scripting
thanks
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KILL(1) BSD General Commands Manual KILL(1)
NAME
kill -- terminate or signal a process
SYNOPSIS
kill [-s signal_name] pid ...
kill -l [exit_status]
kill -signal_name pid ...
kill -signal_number pid ...
DESCRIPTION
The kill utility sends a signal to the process(es) specified by the pid operand(s).
Only the super-user may send signals to other users' processes.
The options are as follows:
-s signal_name
A symbolic signal name specifying the signal to be sent instead of the default TERM.
-l [exit_status]
Display the name of the signal corresponding to exit_status. exit_status may be the exit status of a command killed by a signal (see
the special sh(1) parameter '?') or a signal number.
If no operand is given, display the names of all the signals.
-signal_name
A symbolic signal name specifying the signal to be sent instead of the default TERM.
-signal_number
A non-negative decimal integer, specifying the signal to be sent instead of the default TERM.
The following pids have special meanings:
-1 If superuser, broadcast the signal to all processes; otherwise broadcast to all processes belonging to the user.
0 Broadcast the signal to all processes in the current process group belonging to the user.
Some of the more commonly used signals:
1 HUP (hang up)
2 INT (interrupt)
3 QUIT (quit)
6 ABRT (abort)
9 KILL (non-catchable, non-ignorable kill)
14 ALRM (alarm clock)
15 TERM (software termination signal)
kill is a built-in to csh(1); it allows job specifiers of the form ``%...'' as arguments so process id's are not as often used as kill argu-
ments. See csh(1) for details.
SEE ALSO
csh(1), pgrep(1), pkill(1), ps(1), kill(2), sigaction(2), signal(7)
STANDARDS
The kill function is expected to be IEEE Std 1003.2 (``POSIX.2'') compatible.
HISTORY
A kill command appeared in Version 6 AT&T UNIX.
BSD
April 28, 1995 BSD