boot tools

• df -h
• sudo fdisk -l
• lsblk flags:
  • -f to get more verbose output
  • -o to get specific output columns, use -h option to see list of column options
• blkid
• ls -l /dev/disk/by-id, additional list options:
  • ls -l /dev/disk/by-uuid
• sudo lshw -class disk
• findmnt

This is a command line utility that allows handling of the UEFI boot menu.

• Debian or derivative: sudo apt install efibootmgr
• Arch / Manjaro: sudo pacman -S efibootmgr

Simply efibootmgr or sudo efibootmgr, use the -v flag for a more verbose output

Take the displayed BootOrder and and append and adjust to the following command to adjust: sudo efibootmgr -o
Current: BootOrder: 0003,000A,0002,000B,0001,0006,0007,0008,0009,0000
Adjusted: sudo efibootmgr -o 0002,000B,0003,000A,0001,0006,0007,0008,0009,0000

Install command grub-efi: sudo apt install grub-efi
Mount the the EFI System Partition: sudo mount /dev/sdd1 /boot/efi
Install Grub boot loader: sudo grub-install /dev/sdd –target=x86_64-efi –efi-directory=boot/efi/

sudo efibootmgr -t 10 to set boot selection time to 10 seconds

sudo efibootmgr --delete-bootnum --bootnum 0

• Use Linux efibootmgr Command to Manage UEFI Boot Menu
• Take Control of Your PC with UEFI Secure Boot
• How to manage EFI boot manager entries on Linux

How to Verify, Activate, or Turn Off Secure Boot on Linux

• sudo mokutil –sb-state to check secure boot status. Also sudo dmesg | grep -i secure
• sudo mokutil –disable-validation to disable Secure Boot validation without entering firmware
• sudo mokutil –enable-validation to re-enable Secure Boot validation.

What is ventoy
Ventoy is an open source tool to create bootable USB drive for ISO/WIM/IMG/VHD(x)/EFI files.

• With ventoy, you don't need to format the disk over and over, you just need to copy the ISO/WIM/IMG/VHD(x)/EFI files to the USB drive and boot them directly.
• You can copy many files at a time and ventoy will give you a boot menu to select them (screenshot).
• x86 Legacy BIOS, IA32 UEFI, x86_64 UEFI, ARM64 UEFI and MIPS64EL UEFI are supported in the same way.
• Most type of OS supported (Windows/WinPE/Linux/ChromeOS/Unix/VMware/Xen…)

This can be loaded on to a USB disk instead of a flash drive for a potential better overall experience.