GRUB_TIMEOUT=5 GRUB_DEFAULT=0 GRUB_DISABLE_SUBMENU="true" GRUB_TERMINAL_OUTPUT="console" GRUB_CMDLINE_LINUX="vconsole.keymap=us crashkernel=no vconsole.font=latarcyrheb-sun16 console=tty1 console=ttyS0 quiet net.ifnames=0" GRUB_TERMINAL="serial console" GRUB_DISABLE_RECOVERY="true" GRUB_DISABLE_UUID="true" GRUB_DISABLE_LINUX_UUID="true" GRUB_DISTRIBUTOR="$(sed 's, release .*$,,g' /etc/system-release)"