zeldor.biz

Linux, programming and more

Copyright © 2023
Log in

Reboot with Magic SysRq

October 4, 2011 by Igor Drobot Leave a Comment

In some situations you cant reboot your server with “reboot” or “init 6” commands. Try this magic solution:

System will just make a hard reset as if you pressed a reset button, without running any shutdown scripts or umounting of your filesystem.

First enable SysRq:

1
echo 1 > /proc/sys/kernel/sysrq

echo 1 > /proc/sys/kernel/sysrq

Now your can send magic commands, example reboot:

1
echo b > /proc/sysrq-trigger

echo b > /proc/sysrq-trigger

Hard Shutdown of your system immediately (Like Power Off button):

1
echo o > /proc/sysrq-trigger

echo o > /proc/sysrq-trigger

Filed Under: Linux Tagged With: reboot, Shutdown, SysRq

Categories

Archives

Tags

apache2 Apple arduino ARM Automation backup bash Cisco Cluster Corosync Database Debian Debian squeeze DIY DNS Fedora FTP Fun Icinga Ipv6 KVM Linux LVM MAC OS X Monitoring MySQL Nagios Nginx openSUSE OpenVPN PHP Proxy Python python3 qemu RAID rsync Samba security ssh Ubuntu virtualization Windows Windows 7 Wordpress

Leave a Reply

Your email address will not be published. Required fields are marked *