GRUB_DISABLE_RECOVERY=true GRUB_DISABLE_OS_PROBER=true GRUB_THEME="/boot/grub2/themes/rosa/theme.txt" GRUB_DISTRIBUTOR="ROSA" GRUB_TIMEOUT=5 GRUB_GFXMODE=1024x768,1024x600,800x600,640x480 GRUB_BACKGROUND="/boot/grub2/themes/rosa/terminal_background.png" GRUB_GFXPAYLOAD_LINUX=keep GRUB_OS_PROBER_LINKED=false GRUB_CMDLINE_LINUX_DEFAULT='splash=silent logo.nologo quiet' GRUB_DISABLE_LINUX_UUID=true GRUB_SAVEDEFAULT=false GRUB_DEFAULT="0"