Boot Linux in UEFI mode with an EFI boot program stored on the ESP.
What does UEFI do before the kernel?
UEFI follows boot entries to select and execute an EFI program, such as a bootloader, from the EFI System Partition.
Detailed explanation
Incorrect. systemd service dependencies are resolved later in userspace.
Incorrect. systemd service dependencies are resolved later in userspace.
Correct. UEFI loads and executes the selected EFI program from the boot entry.
Correct. UEFI loads and executes the selected EFI program from the boot entry.
Incorrect. Signals to user processes occur after userspace starts.
Incorrect. Signals to user processes occur after userspace starts.
Incorrect. /etc/fstab is processed after the kernel and init system start.
Incorrect. /etc/fstab is processed after the kernel and init system start.
Try it yourself
An example you can run in a temporary verification environment.
test -d /sys/firmware/efi && echo UEFI || echo non-UEFI-or-hiddenExpected result
現在environmentでUEFI情報が公開されているかKey points
- UEFI
- ESP
- EFI application
Notes
- Environment: UEFI起動情報を読み取り確認
- Command output formatting can vary slightly by distribution or tool version.
- Run the example in a temporary directory or process when possible.
Foundation review
Read the scope first
Check whether the command acts on the current shell, a new process, an existing process, or a file.
Verify the observable result
Use the supplied command and compare the output with the expected result.