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Automatically reboot on kernel panic
Linux can automatically reboot after a kernel panic. The sysctl /proc/sys/kernel/panic controls this; 0 (default) disables the behavior, while any value greater than zero is the number of seconds to wait before reboot. This can be made persistent by setting in /etc/sysctl.conf:
kernel.panic = 5
Linux will wait 5 seconds before automatically rebooting.
Compiling a single Linux kernel module
make -C /lib/modules/`unam e -r`/build M=`pwd`
Disable IPv6
Add ipv6.disable=1 as a kernel boot parameter.
Empty disk cache
Forces the Linux kernel to discard/invalidate all disk caches.
sync
echo 3 > /proc/sys/vm/drop_caches
