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Thread: Emergency Shutdown?

  1. #1
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    Emergency Shutdown?

    I use Ubuntu 10.10 (name and surname: Maverick Meerkat)
    I know the key combination "ALT + SYSRQ + R E I S U B". That is an "Emergency Reboot" if a program freezes.
    What's the key combo for the shutdown?

  2. #2
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    Re: Emergency Shutdown?

    Ctrl+Alt+Del usually brings up a shutdown dialogue.
    Attached Images Attached Images

  3. #3
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    Re: Emergency Shutdown?

    Hi

    ALT + SYSRQ + R E I S U O

    Kind regards
    If you believe everything you read, you better not read. ~ Japanese Proverb

    If you don't read the newspaper, you're uninformed. If you read the newspaper, you're mis-informed. - Mark Twain

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  4. #4
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    Re: Emergency Shutdown?

    This looks useful.
    Could someone please elaborate what ALT + SYSRQ + R E I S U O actually means?

  5. #5
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    Re: Emergency Shutdown?

    hI

    Could someone please elaborate what ALT + SYSRQ + R E I S U O actually means?
    It's a safe shutdown of the PC. Try it.

    http://en.wikipedia.org/wiki/Magic_SysRq_key

    http://www.ubuntugeek.com/how-to-use...ntu-linux.html

    Kind regards
    Last edited by matt_symes; March 7th, 2011 at 12:02 PM.
    If you believe everything you read, you better not read. ~ Japanese Proverb

    If you don't read the newspaper, you're uninformed. If you read the newspaper, you're mis-informed. - Mark Twain

    Thinking about becoming an Ubuntu Member?

  6. #6
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    Re: Emergency Shutdown?

    Quote Originally Posted by veggen View Post
    This looks useful.
    Could someone please elaborate what ALT + SYSRQ + R E I S U O actually means?
    "R" changes the keyboard to raw mode

    "E" tells all running programs to stop what they are doing and close. Same as if you selected "Close" from a programs menu.

    "I" interrupts whatever programs didn't close in the previous step, and closes them.

    "S" syncs the discs, writing whatever data might be in the buffers into the discs.

    "U" remounts hard drives in read-only mode. We just made sure that discs are synced in previous step, so we don't want to make any more changes to them.

    "O" shuts down (or "B" reboots)

    Remember to give the system a bit of time between each command to allow it to actually complete.

    So, in short, the whole thing tells all programs to close, kills whatever programs didn't close on their own, then makes sure all data that should be written to drives really gets there, and finally restarts or shuts down the system.

  7. #7
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    Re: Emergency Shutdown?

    Thanks guys. I had no clue this existed.

  8. #8
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    Re: Emergency Shutdown?

    Quote Originally Posted by veggen View Post
    Thanks guys. I had no clue this existed.
    There is a phrase to help you remember the keys.

    Raising
    Skinny
    Elephants
    Is
    Utterly
    Boring

    or...

    Reboot
    System
    Even
    If
    Utterly
    Broken

    You can use the keys in this order as well.
    Intel-System Freeze Post#22
    How to mark your thread [SOLVED]
    Registered Linux User-#473773-Ubuntu User-#23255-Machine-#384048

  9. #9
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    Re: Emergency Shutdown?

    While I've only used this once, I assume you can use the commands in any sequence, or in isolation?

    For example, to write cached data, could one simply press alt-sysrq-s?

  10. #10
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    Re: Emergency Shutdown?

    Hi

    Quote Originally Posted by Dutch70 View Post
    There is a phrase to help you remember the keys.

    Raising
    Skinny
    Elephants
    Is
    Utterly
    Boring

    or...

    Reboot
    System
    Even
    If
    Utterly
    Broken

    You can use the keys in this order as well.
    Or BUSIER backwards

    Kind regards
    If you believe everything you read, you better not read. ~ Japanese Proverb

    If you don't read the newspaper, you're uninformed. If you read the newspaper, you're mis-informed. - Mark Twain

    Thinking about becoming an Ubuntu Member?

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