FreeBSD

mkdir /usr/dumpdir
echo 'fsck_y_enable="YES"' >> /etc/rc.conf
echo 'dumpdir="/usr/dumpdir" >> /etc/rc.conf

makeoptions DEBUG=-g
options KDB_UNATTENDED



Linux

echo 'echo 5 > /proc/sys/kernel/panic' >> /etc/rc.local
sysctl -p