Zombie Process
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top - 15:47:15 up 9 days, 14:09, 2 users, load average: 0.72, 0.41, 0.18 |
A zombie process is nothing to worry about. It is not _any_ sort of security issue. I dug this up on google, it explains a zombie process better than I could:
http://www.ale.org/archive/ale/ale-1.../msg00394.html |
Thank you very much. I have one more question, as you see in that copy of my pc's statistics i have two users running on my pc. What i need to find out is who is the other user. When i type "users" i get "root root" twice. Is there any way for me to figure out why i have two root accounts running? I had installed clamav a couple of days back but i assumed that the group would be named clamav (installed using a .tgz file) Any ideas?
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a zombie process is an uncleaned proccess on your system......
due to maybe a program bug........ a zombie process have 'Z' ,not 'S' or 'R' state. I can't see it on your 'top' post...... |
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Jrlz, He sees 'zombie' here: Tasks: 64 total, 1 running, 62 sleeping, 0 stopped, 1 zombie But yes, none of the processes are in a 'Z'ombie state. So I'm wondering how top is picking that up. -twantrd |
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USER TTY FROM LOGIN@ IDLE JCPU PCPU WHAT |
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The second terminal is the 'pts/0' which is normally used by the gui mode to open a separate session for the user to log in again in the gui mode. When you will log out of the gui mode it will again take you the terminal 'tty1' and then after issuing the command 'w' will show you on only one user i.e. the first one. If you want to go to 'tty1' from the gui mode without logging out from the gui mode you can use the key combination 'Ctrl+Alt+F1'. |
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I don't think it has anything to do with bugs. The link that bulliver provides isn't working for me (dunno if others here are having the same issue), so here's another definition: A zombie process doesn't react to signals because it's not really a process at all- it's just what's left over after it died. What's supposed to happen is that its parent process was to issue a "wait()" to collect the information about its exit. If the parent doesn't (programming error or just bad programming), you get a zombie. The zombie will go away if its parent dies- it will be "adopted" by init which will do the wait()- so if you see one hanging about, check its parent; if it is init, it will be gone soon, if not the only recourse is to kill the parent..which you may or may not want to do. -- from http://aplawrence.com/SCOFAQ/FAQ_scotec6cantkill.html |
use the 'who' command to see who is logged in and if they are logged in from a local console or from a remote host.
also, to see if you have any zombie processes, use 'ps -aux'. if you see a 'Z' in the STAT column, then that process is zombied. not a big deal unless you have many. |
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