File: //etc/default/grub
GRUB_TIMEOUT=5
GRUB_DISTRIBUTOR="$(sed 's, release .*$,,g' /etc/system-release)"
GRUB_DEFAULT=saved
GRUB_DISABLE_SUBMENU=true
GRUB_TERMINAL_OUTPUT="console"
GRUB_CMDLINE_LINUX="crashkernel=auto biosdevname=0 net.ifnames=0 rhgb quiet"
GRUB_DISABLE_RECOVERY="true"
GRUB_ENABLE_BLSCFG=true
GRUB_CMDLINE_LINUX="$GRUB_CMDLINE_LINUX audit=1"
GRUB_CMDLINE_LINUX="$GRUB_CMDLINE_LINUX net.ifnames=0 biosdevname=0"
GRUB_CMDLINE_LINUX="$GRUB_CMDLINE_LINUX console=ttyS0,115200n8 console=tty1"
GRUB_TIMEOUT=10