easyMultiple ChoiceObjective-mapped
XK0-006 Practice Question: That their system fails to boot and displays a…
A user reports that their system fails to boot and displays a 'GRUB' prompt. Which command should be run first to attempt to load the operating system manually?
⚠ Common exam trap
Many candidates confuse the GRUB prompt with a system rescue shell and try to use system-level commands like `reboot` or `exit`, not realizing that GRUB has its own command set where `boot` is the correct action to load the OS.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
boot
When the system boots to a GRUB prompt, it means the bootloader has loaded but cannot find or automatically load the operating system. The `boot` command at the GRUB prompt instructs GRUB to attempt to boot the currently configured kernel and initramfs, which is the correct first step to manually load the OS.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
rescue
Why it's wrong here
'rescue' is not a valid GRUB command.
- ✗
reboot
Why it's wrong here
'reboot' restarts the system, not load GRUB.
- ✓
boot
Why this is correct
'boot' at the GRUB prompt loads the selected kernel.
- ✗
exit
Why it's wrong here
'exit' returns to the previous GRUB menu.
Go deeper
Related to this question
Learn chapter
User and Group Administration
Key term
Kernel
The kernel is the core program of an operating system that manages hardware resources and provides essential services for all other software to run.
Key term
Operating system
An operating system (OS) is the core software that manages a computer's hardware and software resources, providing common services for computer programs.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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