Linux Magic System Request Key Hacks

Discussion in 'Other Operating Systems' started by GumbyNoTalent, Dec 13, 2017.

  1. GumbyNoTalent

    GumbyNoTalent Member

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    https://www.kernel.org/doc/html/v4.12/admin-guide/sysrq.html

    Good doco on feature not many people know about, beyond usually forcing a crash dump.
     
  2. waltermitty

    waltermitty Member

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  3. OP
    OP
    GumbyNoTalent

    GumbyNoTalent Member

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    So many cool things in Linux land, everyday is an adventure in new information.
     
  4. BAK

    BAK Member

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    Probably because you need to explicitly enable it when compiling kernel - the way the document linked reads suggests this isn't done by default.

    Nonetheless as Gumby suggests - many cool things to learn, and this is one of them!
     
  5. OP
    OP
    GumbyNoTalent

    GumbyNoTalent Member

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    yeah I only found it after asking a question about force crashing embedded systems.
     
  6. Quadbox

    Quadbox Member

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    It wasnt always thus, though. Back in the day it used to be enabled on the vast majority of kernels, it's in the last sort of 12 years it's mostly been disabled on most distros. In much the same way as ctrl-alt-backspace is often turned off by default in X in a lot of distros
     
  7. schmoove

    schmoove Member

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    Luckily it's enabled on all the distros I've tried it on.
    REISUB :)
     

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