LPIC-1 Devices, Filesystems and FHS Practice Question
An administrator needs to mount an ISO image file /tmp/image.iso to the directory /mnt/iso. Which command should be used?
⚠ Common exam trap
The trap here is that candidates often forget the `-o loop` option and assume mount can directly handle a file path, or they confuse the read-only option (`-o ro`) with the loop option, thinking read-only is sufficient for ISO images.
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
✓
mount -o loop /tmp/image.iso /mnt/iso
The `-o loop` option tells the mount command to use a loop device, which is required to mount a file (like an ISO image) as if it were a block device. Without the loop option, mount expects a block device path, not a regular file.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
mount -o loop /tmp/image.iso /mnt/iso
Why this is correct
Correct: loop option needed for file.
- ✗
mount -o ro /tmp/image.iso /mnt/iso
Why it's wrong here
Missing loop option.
- ✗
mount -t iso /tmp/image.iso /mnt/iso
Why it's wrong here
Invalid filesystem type.
- ✗
mount /tmp/image.iso /mnt/iso
Why it's wrong here
Missing -o loop; will fail.
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