Boot from a disk using legacy BIOS and the MBR partitioning scheme.
Inspect what is stored in the disk's first sector.
What does the MBR contain?
A traditional MBR contains initial boot code, a basic partition table, and a boot signature in the first sector.
Detailed explanation
Incorrect. Kernel modules and initramfs are stored elsewhere and loaded later.
Incorrect. Kernel modules and initramfs are stored elsewhere and loaded later.
Correct. The MBR contains boot code and the primary partition table plus its signature.
Correct. The MBR contains boot code and the primary partition table plus its signature.
Incorrect. systemd unit definitions are normal filesystem files.
Incorrect. systemd unit definitions are normal filesystem files.
Incorrect. User home directories are normal filesystem data.
Incorrect. User home directories are normal filesystem data.
Try it yourself
An example you can run in a temporary verification environment.
printf '%s
' 'MBR: boot code + partition table + signature'Expected result
MBR: boot code + partition table + signatureKey points
- The MBR is at the disk start
- It contains initial boot code
- It contains the basic partition table
Notes
- Environment: BIOS / MBR概念
- 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.