Panic on sigtar.com

emergency reboot a hung Linux host

Thu, 10 Sep 2020 00:00:00 +1200

Sometimes you need something that can kick a host a bit harder than the standard reboot command. Even if you include the -f switch to force, a hung task can prevent your host from rebooting.

Try this - first enable the sysrq setting, then trigger. Your host should reboot immediately.

sudo echo 1 > /proc/sys/kernel/sysrq
sudo echo b > /proc/sysrq-trigger

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.

time to disable coinhive - hysteria ensues

Mon, 29 Oct 2018 00:00:00 +1300

See my previous post here - /2017/10/13/coinhive-alternative

So the trial of coinhive and associated monero browser mining has come to an end. It seems most corporate firewalls and security appliances detect and block access to my domain just being associated with the coinhive java-script.

Even though i was being a polite net citizen and disclosing it on the site - firewalls with strict polices dont give it a chance. Several public DNS servers have also block listed the site - hopefully this will be undone soon.

Opensolaris - ZFS recovery after kernel panic

Mon, 19 Oct 2009 00:00:00 +1300

Recently i hit what i thought was a huge disaster with my ZFS array. Essentially i was unable to import my zpool without causing the kernel to panic and reboot. Still unsure of the exact reason, but it didn’t seem to be due to a hardware fault. (zpool import showed all disks as ONLINE)

When i tried to import with zpool import -f tank the machine would lockup and reboot (panic).