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GNU/Linux: Emergency Restart
- code_duck 16y agoThis can be handy, no doubt. I have a monitor that flips out blinking if you knock the cord, which my cat has seen fit to do a couple of times. Don't forget the mnemonic - Raising Elephants Is So Utterly Boring. There are a couple of variations: REISUO will shutdown rather than reboot. Some prefer RSEIUB, syncing earlier in the process - aka Rasing Skinny Elephants Is Unusually Bland. You may wish to throw another Sync in there to make RSEISUB.
- Jach 16y agoI still prefer the mnemonic "Reboot Even If System Utterly Broken", plus it describes what it does. :)
- deleted 16y ago[deleted]
- nicolasbrailo 16y agoThe order of the keys is really not that important but the order of the functions each one performs indeed matters. Usually you don't wan't to reboot before you sync :P
- yigit 16y agomost easy way of remembering is : BUSIER, only backwards.
- deleted 16y ago[deleted]
- johnswamps 16y agoIt's usually worth trying to ssh into the machine when X locks up (if you don't want to just reboot). Depending on what caused the problem, this will often still work even when it's unresponsive locally.
- metageek 16y agoOr you can press Ctrl-Alt-F1 to get to the console.
- bcl 16y agoIIRC the kernel needs to be compiled with the magic sysreq keys enabled, so if this doesn't work for you you will likely need to rebuild your kernel. Or grow a couple extra digits.
- surki 16y agoYou don't have to recompile, you can control it through proc (/proc/sys/kernel/sysrq)
- cnvogel 16y agoFurther information about how and what to trigger things with the Magic-Sysrq-Key is documented in $KERNEL/Documentation/sysrq.txt, which you can access for example in Linus' GIT tree at... http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=blob_plain;f=Documentation/sysrq.txt;hb=HEAD http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6... One very useful function, for example, is to force a hard reboot when ssh'ed into a server: echo b >/proc/sysrq-trigger