I ran the sudo nano /etc/default/grub to get the grub menu, with the following text: GRUB_DEFAULT=0 GRUB_TIMEOUT_STYLE=hidden GRUB_TIMEOUT=15 GRUB_DISTRIBUTOR=`( . /etc/os-release && echo ${NAME} )` GRUB_CMDLINE_LINUX_DEFAULT="quiet splash" GRUB_CMDLINE_LINUX="" GRUB_DISABLE_OS_PROBER=false This is the complete screen for the operation hikmat-faraj@hikmat-faraj-Studio-1555:~$ sudo nano /etc/default/grub [sudo: authenticate] Password:...
Originally asked by Hikmat Faraj on Stack Exchange (askubuntu) (CC BY-SA 4.0).