kill (but not Bill)

Pedroski · 07-13-2011, 02:53 AM

Yesterday, I wanted to talk to someone on Skype. Skype was running, had been for two days that I hadn't switched off. The girl I wanted to talk to said, over another chat, I wasn't online with Skype. I told Skype to quit, I thought, if I restart it, things will be fine. But it wouldn't quit, just sat there. I opened System tools>System monitor, opened processes and told it to kill Skype. No joy. I opened a terminal and as root said: kill 22926 (which was it's id). Nothing.

I had to reboot to stop Skype. Could I have stopped Skype any other way??

Diantre · 07-13-2011, 03:01 AM

Perhaps kill -9 <pid> can help next time...

H_TeXMeX_H · 07-13-2011, 03:02 AM

Code:

kill -KILL 22926
killall -KILL skype

Diantre · 07-13-2011, 03:09 AM

Quote:

Originally Posted by H_TeXMeX_H

Code:

kill -KILL 22926
killall -KILL skype

Hmm... Now I have a question. Is it KILL or SIGKILL? Or is it the same?

Code:

$ kill -l
 1) SIGHUP	 2) SIGINT	 3) SIGQUIT	 4) SIGILL	 5) SIGTRAP
 6) SIGABRT	 7) SIGBUS	 8) SIGFPE	 9) SIGKILL	10) SIGUSR1
11) SIGSEGV	12) SIGUSR2	13) SIGPIPE	14) SIGALRM	15) SIGTERM
16) SIGSTKFLT	17) SIGCHLD	18) SIGCONT	19) SIGSTOP	20) SIGTSTP
21) SIGTTIN	22) SIGTTOU	23) SIGURG	24) SIGXCPU	25) SIGXFSZ
26) SIGVTALRM	27) SIGPROF	28) SIGWINCH	29) SIGIO	30) SIGPWR
31) SIGSYS	34) SIGRTMIN	35) SIGRTMIN+1	36) SIGRTMIN+2	37) SIGRTMIN+3
38) SIGRTMIN+4	39) SIGRTMIN+5	40) SIGRTMIN+6	41) SIGRTMIN+7	42) SIGRTMIN+8
43) SIGRTMIN+9	44) SIGRTMIN+10	45) SIGRTMIN+11	46) SIGRTMIN+12	47) SIGRTMIN+13
48) SIGRTMIN+14	49) SIGRTMIN+15	50) SIGRTMAX-14	51) SIGRTMAX-13	52) SIGRTMAX-12
53) SIGRTMAX-11	54) SIGRTMAX-10	55) SIGRTMAX-9	56) SIGRTMAX-8	57) SIGRTMAX-7
58) SIGRTMAX-6	59) SIGRTMAX-5	60) SIGRTMAX-4	61) SIGRTMAX-3	62) SIGRTMAX-2
63) SIGRTMAX-1	64) SIGRTMAX

H_TeXMeX_H · 07-13-2011, 03:11 AM

I think -KILL is equivalent to -9, but I don't remember -9 as easily.

Diantre · 07-13-2011, 03:33 AM

Quote:

Originally Posted by H_TeXMeX_H

I think -KILL is equivalent to -9, but I don't remember -9 as easily.

True. Words are easier to remember. Anyway, I've been killing a shell script repeatedly, and it seems -KILL, -SIGKILL and -9 are equivalent. In all cases the shell prints "Killed".

MTK358 · 07-13-2011, 07:18 AM

Without the "-9" or "-KILL" option, it just sends a signal to the process that tells it to quit. But if it's really hung up, it could ignore that. But with the "-9" option, it directly tells the kernel to stop running the process, and it's impossible for the misbehaving process to stop it.

chrism01 · 07-13-2011, 08:36 PM

@H_TeXMeX_H: try this -9 = 9mm (as in handgun ... then you'll remember it

)

dulanjan007 · 06-23-2012, 07:59 AM

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---------- Post added 06-23-12 at 07:59 AM ----------

http://dulanjan007.blogspot.com/2012...ce-i-came.html

arifur · 06-23-2012, 11:05 AM

Quote:

ps aux | grep <program name>

Example:
This will find the program and provide you the PID

Quote:

ps aux | grep firefox

Then just kill the PID
kill -9 <PID>

Quote:

kill -9 3486

Hope this helps.