The correct answer is running quotaon on the filesystem, as this command activates the quota subsystem and enforces the limits that have been defined. While edquota is used to set soft and hard limits for users or groups by editing their quota records, quotaon is the essential step that turns those settings into active enforcement on a specified mount point. On the CompTIA Linux+ XK0-005 exam, this distinction is frequently tested to ensure you understand the difference between configuration and activation—a common trap is confusing edquota (which sets limits) with quotaon (which enforces them). Remember that valid methods to enforce disk quota limits on a Linux filesystem always involve enabling the quota system after configuration; a useful memory tip is “edit with edquota, enforce with quotaon.”
XK0-005 Security Practice Question
This XK0-005 practice question tests your understanding of security. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. 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.
Which TWO of the following are valid methods to enforce disk quota limits on a Linux filesystem? (Select TWO.)
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Using 'edquota' to set soft and hard limits for users
Option A is correct because 'edquota' is the standard interactive command used to set soft and hard disk quota limits for users or groups on a Linux filesystem. It opens the user's quota settings in a text editor, allowing precise configuration of block and inode limits. Option E is correct because 'quotaon' is the command that enables quota enforcement on a specified filesystem, activating the quota subsystem after limits have been defined.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✓
Using 'edquota' to set soft and hard limits for users
Why this is correct
Setting limits with edquota prepares enforcement when quotas are on.
Related concept
Read the scenario before looking for a memorised answer.
✗
Using 'setquota' to set limits in a script
Why it's wrong here
setquota sets limits but does not enforce; enforcement requires quotaon.
✗
Running 'repquota' to generate reports
Why it's wrong here
repquota only reports usage, does not enforce.
✗
Running 'quotacheck' to update quota files
Why it's wrong here
quotacheck scans and updates, but does not enforce limits.
✓
Running 'quotaon' on the filesystem
Why this is correct
quotaon activates quota enforcement.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates confuse commands that set or check quotas (edquota, setquota, repquota, quotacheck) with the actual enforcement mechanism (quotaon), leading them to select multiple configuration or reporting commands instead of the one that activates enforcement.
Detailed technical explanation
How to think about this question
Disk quota enforcement in Linux relies on the kernel's quota subsystem, which is activated per filesystem using 'quotaon'. The 'edquota' command modifies the quota database files (typically aquota.user and aquota.group) stored in the filesystem root, setting soft limits (which trigger warnings) and hard limits (which block further writes). The 'quotaon' command then tells the kernel to read these files and begin enforcing the limits at the VFS (Virtual File System) layer, intercepting write operations that would exceed the hard limit.
KKey Concepts to Remember
Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.
TExam Day Tips
→Watch for words such as best, first, most likely and least administrative effort.
→Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A practitioner preparing for the XK0-005 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.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this XK0-005 question in full detail.
Security — This question tests Security — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Using 'edquota' to set soft and hard limits for users — Option A is correct because 'edquota' is the standard interactive command used to set soft and hard disk quota limits for users or groups on a Linux filesystem. It opens the user's quota settings in a text editor, allowing precise configuration of block and inode limits. Option E is correct because 'quotaon' is the command that enables quota enforcement on a specified filesystem, activating the quota subsystem after limits have been defined.
What should I do if I get this XK0-005 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Question Discussion
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