Magic SysRq key - Wikipedia

This article is written like a manual or guide. Please help rewrite this article and remove advice or instruction. (June 2012) The SysRq key The magic SysRq key is a key combination understood by the Linux kernel, which allows the user to perform various low-level commands regardless of the system's state. It is often used to recover from freezes, or to reboot a computer without corrupting the fil

[kirakking]

“/etc/sysctl.d/10-magic-sysrq.conf” Ubuntu 18 だとこれが kernel.sysrq の値を決定。値が 176 になっていたのは、16+32+128 を有効にしていたため。デフォルトでは oom-killer は無効。

[Haaaa_N]

なるほど

[khiker]

Sysrq + なにか。手元の thinkpad + xubuntu 12.10 だと、kernel.sysrq の値は、176 sync reboot unmount ができるらしい / Alt + PrintScreen + s で Emergency Sync が走った。

[asari3]

echo b > /proc/sysrq-trigger