Try to force a kernel panic for testing, need kernel source::

    sudo apt-get install linux-headers-server linux-source ncurses-dev

    cd ~/src
    tar xvjf /usr/src/linux-source-2.6.28.tar.bz2
    cd linux-source-2.6.28

    make menuconfig
    # Disabled a bunch of crap so kernel would compile faster
    make vmlinux
    make modules_prepare

    mkdir ~/module
    cd ~/module

    # Kbuild:
    #
    #   obj-m := panic.o

    # Makefile:
    #
    #   KERNELDIR := /home/garry/src/linux-source-2.6.28/
    #
    #   all::
    #           $(MAKE) -C $(KERNELDIR) M=`pwd` $@

    # panic.c:
    #
    #  #include <linux/module.h>
    #
    #  int init_module (void) /* Loads a module in the kernel */
    #  {
    #    panic("I'm sick :(\n");
    #    return 0;
    #  }

    make -C ~/src/linux-source-2.6.28/ M=`pwd`

  To crash the box::

    cd ~/module
    sudo insmod ./panic.ko