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How do I lock down grub?
GRUB security features allow you to lock down the editing of boot options accessed by pressing the ‘e’ key and they allow you to password protect selected or all boot entries.
You can get GRUB to show the menu even if the default GRUB_HIDDEN_TIMEOUT=0 setting is in effect:
- If your computer uses BIOS for booting, then hold down the Shift key while GRUB is loading to get the boot menu.
- If your computer uses UEFI for booting, press Esc several times while GRUB is loading to get the boot menu.
How do I change the default OS in grub bootloader?
You need to edit the /etc/default/grub file to set Windows as your default OS. You will then select the Windows partition, in my case “Windows 7 (loader) (on /dev/sda1)” including the double quotes and copy it. It will open the /etc/default/grub file with gedit.
How do I find my grub password in Linux?
Login in with root account and open the file /etc/grub. d/40_custom. To remove the password, remove the set superusers and password or password_pbkdf2 directives and save the file. To reset or change the password, update the password or password_pbkdf2 directives and save the file.
How to set Grub to the same drive as Linux?
Set GRUB’s root device to the same drive as GNU/Linux’s. The command search –set=root –file /vmlinuz or similar may help you (see search). Load the kernel using the command linux (see linux): grub> linux /vmlinuz root=/dev/sda1. If you need to specify some kernel parameters, just append them to the command.
When does Grub drop to the command line?
GRUB looks for its configuration file as soon as it is loaded. If one is found, then the full menu interface is activated using whatever entries were found in the file. If you choose the command-line menu option, or if the configuration file was not found, then GRUB drops to the command-line interface.
Is there a way to read files from GRUB 2?
GRUB 2 can read files directly from LVM and RAID devices. A graphical terminal and a graphical menu system are available. GRUB 2’s interface can be translated, including menu entry names. The image files (see Images) that make up GRUB have been reorganised; Stage 1, Stage 1.5, and Stage 2 are no more.
What is the purpose of the GNU GRUB program?
GRUB is designed to address the complexity of booting a personal computer; both the program and this manual are tightly bound to that computer platform, although porting to other platforms may be addressed in the future.