Edit: /etc/default/grub (372B)
GRUB_TIMEOUT=0
GRUB_DISTRIBUTOR="$(sed 's, release .*$,,g' /etc/system-release)"
GRUB_DEFAULT=saved
GRUB_DISABLE_SUBMENU=true
GRUB_TERMINAL_OUTPUT="console"
GRUB_CMDLINE_LINUX="console=tty0 console=ttyS0,115200n8 no_timer_check biosdevname=0 net.ifnames=0 initcall_blacklist=algif_aead_init selinux=0 rootflags=uquota"
GRUB_DISABLE_RECOVERY="true"
GRUB_ENABLE_BLSCFG=true