Take the tour ×  Just as a curiosity; something went wrong with
a Linux machine, making the root file system show up as "64Z". A
few commands work, like top, df, and kill, but others like
reboot come up with "command not found" (since it can't read the
root filesystem), and chmod comes up with a segmentation fault.
Is there any way to restart the system anyway, i.e. without the
reboot program? I tried kill -PWR 1 (sending SIGPWR to init),
but this didn't seem to do anything.  It's mostly an academic
curiosity. The labmate who was doing whatever large-database
work that caused the failure will be physically restarting the
machine soon.  share|improve this question Hopefully this will
save me from the problem next time ... [
cyberciti.biz/tips/reboot-linux-box-after-a-kernel-panic.html ]
–  gatoatigrado Dec 27 '11 at 8:13 Have you see that the problem
with the root fs has triggered a kernel panic ? –  Hanan N. Dec
27 '11 at 9:52 add comment  5 Answers  up vote 21 down vote
accepted  Try to reboot with magic sy