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Question

Difficulty: MediummacOS and Linux Operating System Features and Tools

A Linux technician needs to create a raw, bit-by-bit sector copy of an unmounted storage drive located at `/dev/sdb` and output it to an image file named `/mnt/backups/disk.img` for data recovery analysis. Which of the following commands should the technician use?

  1. dd if=/dev/sdb of=/mnt/backups/disk.imgAnswer
  2. B
    tar -czvf /mnt/backups/disk.img /dev/sdb
  3. C
    rsync -a /dev/sdb /mnt/backups/disk.img
  4. D
    chown root:root /dev/sdb /mnt/backups/disk.img

Answer

The command 'dd if=/dev/sdb of=/mnt/backups/disk.img' is the correct tool to generate a raw block-level image of a physical drive.
The 'dd' command reads raw sectors directly from an specified input device ('if=/dev/sdb') and writes an identical copy to the specified output location ('of=/mnt/backups/disk.img'), which is essential for creating raw disk clones and forensic images.

Step-by-Step Solution

1
Identify the source block device and target image destination
Source is set to '/dev/sdb' and destination is set to '/mnt/backups/disk.img'.
Creating a bit-by-bit image requires designating an input file/device and an output file.
2
Select the appropriate utility for block-level drive copying
Choose the 'dd' command line tool.
The 'dd' tool reads low-level blocks directly from the input device ('if') and writes them to the specified output ('of').
3
Verify flag parameters
'if=/dev/sdb' specifies input file/device and 'of=/mnt/backups/disk.img' specifies output file.
Incorrect flag parameters could cause data overwrite if input and output are reversed.

Key Concept

Linux disk imaging with dd
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Topics

macOS and Linux Operating System Features and Tools

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