I tried, and failed, today to send a "Magic Sysrq" to a linux box to which I was connected by a console server. I'm using Mac OS X. Is this even possible? If so, how?
AFAIK, the "Magic SysRQ" gets its magic from it being picked up by very low-level code in the keyboard handler in the kernel, which would preclude it working via any sort of network connection.
Unless you mean that the "console server" is a KVM box of some sort, in which case it should work, unless it filters out certain combinations (for its own use?).
Good question! So by "console server" you mean you've got a serial console? If so, sending a BREAK ought to do it, provided magic sysrq is compiled in and enabled (cat /proc/sys/kernel/sysrq -- should be 1).
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Unless you mean that the "console server" is a KVM box of some sort, in which case it should work, unless it filters out certain combinations (for its own use?).
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I'm going to find a machine that's hooked up to that thing which can be futzed with and find a recipe that works.
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