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LPIC-1 Administrative Tasks Practice Question

An administrator needs to extend a logical volume by 10GB. The volume group has available physical extents. Which command should be used?

⚠ Common exam trap

Test-takers frequently confuse `lvcreate` with `lvextend` or forget the `+` sign in `lvresize`, leading them to choose an option that either creates a new volume or sets an absolute size instead of incrementing it.

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

✓

lvextend -L +10G /dev/vg/lv

The `lvextend` command with the `-L +10G` flag increases the size of the existing logical volume `/dev/vg/lv` by exactly 10 GB, using available physical extents from the volume group. This is the standard LVM command for extending a logical volume without recreating it.

Answer analysis

Option-by-option breakdown

For each option: why learners choose it and why it is or isn't the right answer here.

✗
lvcreate -L 10G /dev/vg/lv
Why it's wrong here
Creates a new LV, does not extend.
✗
vgextend /dev/vg/lv -L +10G
Why it's wrong here
vgextend adds a PV, not extends LV.
✓
lvextend -L +10G /dev/vg/lv
Why this is correct
Correct: extends the LV by 10GB.
✗
lvresize -L 10G /dev/vg/lv
Why it's wrong here
Sets size to 10GB, does not add.

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LPIC-1 Administrative Tasks Practice Question

Why each option matters

Option-by-option breakdown

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