make grub boot faster.

grub-setup.sh

# Setup the box for AIO use
function setup_grub() {
  if [ -f "/etc/default/grub" ];then
    cat > /etc/default/grub <<EOF
GRUB_DEFAULT=0
GRUB_HIDDEN_TIMEOUT=0
GRUB_HIDDEN_TIMEOUT_QUIET=true
GRUB_TIMEOUT=2
GRUB_DISTRIBUTOR="Rackspace Private Cloud"
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"
GRUB_CMDLINE_LINUX=""
GRUB_RECORDFAIL_TIMEOUT=1
EOF

    update-grub
  fi
}