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Thread: Cannot Kill Processes (System Monitor or CLI)

  1. #1
    Join Date
    Apr 2010
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    Ubuntu

    Cannot Kill Processes (System Monitor or CLI)

    A very concerning problem started recently: I cannot kill misbehaving processes (eg. java, skype).

    Action: Highlight the process in the System Monitor and 'End Process'
    Result: No response, the process lives on.

    Action: Do killall <processname> on the terminal.
    Result: No response, the process lives on.

    Action: Do kill <pid> on the terminal.
    Result: No response, the process lives on.

    Any ideas? This problem is infuriating. Typically, the process that cannot be killed is using 100% of one CPU core.

  2. #2
    Join Date
    May 2008
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    22

    Re: Cannot Kill Processes (System Monitor or CLI)

    try this:

    kill -9 PID (PID of the program you are trying to stop)

  3. #3
    Join Date
    Apr 2011
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    25

    Re: Cannot Kill Processes (System Monitor or CLI)

    Code:
    sudo killall -9 skype

  4. #4
    Join Date
    Nov 2012
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    Dayton, OH, USA
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    52
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    Ubuntu 12.04 Precise Pangolin

    Re: Cannot Kill Processes (System Monitor or CLI)

    Nevermind.....

  5. #5
    Join Date
    Apr 2011
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    25

    Re: Cannot Kill Processes (System Monitor or CLI)

    Did you manage to close down Skype and Java?

  6. #6
    Join Date
    Apr 2010
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    Ubuntu

    Re: Cannot Kill Processes (System Monitor or CLI)

    Quote Originally Posted by ScottDeagan View Post
    Did you manage to close down Skype and Java?
    Not just yet- I'm waiting for a process to act up again. As soon as there is one and I can test, I'll reply back.

  7. #7
    Join Date
    Apr 2010
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    Re: Cannot Kill Processes (System Monitor or CLI)

    Quote Originally Posted by ScottDeagan View Post
    Code:
    sudo killall -9 skype
    killall -9 java worked, thank you guys. I wish the signal mapping were covered in the man page for killall. I don't know what '-9' corresponds too, but it must be powerful sauce

  8. #8
    Join Date
    Aug 2011
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    3,174
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    Xubuntu 16.04 Xenial Xerus

    Re: Cannot Kill Processes (System Monitor or CLI)

    Use
    Code:
    kill -l
    (that's lower case L) to get the signal mapping.

    -9 means kill, the default is terminate, which can be ignored by the program you wish to kill.

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