https://sigtar.com/tags/kernel/ Recent content in Kernel on sigtar.com Hugo en-nz Thu, 10 Sep 2020 00:00:00 +1200 https://sigtar.com/2020/09/10/emergency-reboot-a-hung-linux-host/ Thu, 10 Sep 2020 00:00:00 +1200 https://sigtar.com/2020/09/10/emergency-reboot-a-hung-linux-host/ <p><img src="https://sigtar.com/wp-content/uploads/Screenshot-Terminal.png" alt=""></p> <p>Sometimes you need something that can kick a host a bit harder than the standard <strong>reboot</strong> command. Even if you include the <strong>-f</strong> switch to force, a hung task can prevent your host from rebooting.</p> <p>Try this - first enable the sysrq setting, then trigger. Your host should reboot immediately.</p> <p><strong>sudo echo 1 &gt; /proc/sys/kernel/sysrq</strong><br> <strong>sudo echo b &gt; /proc/sysrq-trigger</strong></p> <p>Note : This is effectively a hard reset which does not cleanly shut services or tasks down. You may need to check your disk on some operating systems.</p>