2009/12/14 Johnathon Tinsley <kir...@kirrus.co.uk>: > -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA1 > > >>> <snip> >>> Have you tried using the Magic SysRq key on the keyboard? >>> ... >>> The meanings of the keys, IIRC: >>> R - raw keyboard mode (stop X grabbing the key presses) >>> E - send SIGTERM to all processes >>> I - send SIGTERM to init >>> S - sync the disks >>> U - unmount the mounted partitions >>> B - reboot >> >> It's probably worth mentioning that you need to wait a second or 2 >> between each key press. If you do it too quickly I have noticed it >> doesn't always work. >> > > Almost got all the meanings. > I sends SIGKILL to all processes, killing anything that hasn't yet > terminated itself. You should wait at least 5-10 seconds after hitting > 'e' to hit 'i', because it's effectively kill -9, so will stop all > processes without letting them gracefully stop. > (In fact, it sends SIGKILL to everything *but* init :-) ) > > U doesn't just un-mount the partitions, it remounts them read-only. > Useful if you need to quickly stop writes hitting a corrupted disk, but > don't want to take the system offline! > > And no, you don't need to take your fingers off of the ALT + SYSRQ keys > every time you hit a letter. Many a time have I used "raising elephants > is so" at 3am at our datacentre ;)
Thanks for the corrections and the clarification about removing fingers! > Johnathon Neil. -- ubuntu-uk@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-uk https://wiki.ubuntu.com/UKTeam/
