This LPIC-1 practice question tests your understanding of administrative tasks. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
An administrator needs to extend a logical volume by 10GB. The volume group has available physical extents. Which command should be used?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "which command"
Why it matters: Tests specific CLI syntax. Recall the exact command and its required context — near-synonyms and partial matches are common distractors.
lvcreate -L 10G /dev/vg/lv
Why wrong: Creates a new LV, does not extend.
vgextend /dev/vg/lv -L +10G
Why wrong: vgextend adds a PV, not extends LV.
lvextend -L +10G /dev/vg/lv
Correct: extends the LV by 10GB.
lvresize -L 10G /dev/vg/lv
Why wrong: Sets size to 10GB, does not add.
Answer choices
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
Option C is correct because 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.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
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.
Clue confirmation
The clue word "which command" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
lvresize -L 10G /dev/vg/lv
Why it's wrong here
Sets size to 10GB, does not add.
Common exam traps
The trap here is that candidates 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.
Detailed technical explanation
Under the hood, `lvextend -L +10G` updates the LVM metadata to allocate additional physical extents (PEs) from the volume group to the logical volume, increasing its size by the specified amount. A common real-world scenario is extending a filesystem after extending the LV, which requires a subsequent command like `resize2fs` (for ext4) or `xfs_growfs` (for XFS) to make the additional space usable by the filesystem. The `lvresize` command can also perform the same operation, but only if the `+` sign is used (e.g., `lvresize -L +10G`), making option D incorrect due to the missing `+`.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
A practitioner preparing for the LPIC-1 exam encounters this exact type of scenario on the job. The correct answer here is not the most general option — it is the best answer for the specific constraint described. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Real exam questions reward reading the full scenario before eliminating options, because the constraint defines which answer fits.
What to study next
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
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FAQ
Administrative Tasks — This question tests Administrative Tasks — Read the scenario before looking for a memorised answer..
The correct answer is: lvextend -L +10G /dev/vg/lv — Option C is correct because 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.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Yes — watch for: "which command". Tests specific CLI syntax. Recall the exact command and its required context — near-synonyms and partial matches are common distractors.
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 25, 2026
This LPIC-1 practice question is part of Courseiva's free LPI certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the LPIC-1 exam.
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