Current File : //etc/default/grub

GRUB_ENABLE_BLSCFG=true
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 rd.lvm.lv=centos_air3/root rd.lvm.lv=centos_air3/swap rhgb quiet rootflags=uquota"
GRUB_DISABLE_RECOVERY="true"