The answer is to use the kernel parameter `fsck.mode=skip` at boot. This is correct because it directly instructs systemd to bypass all filesystem checks, allowing the server to skip the stuck fsck job and boot quickly without modifying any persistent configuration files. On the CompTIA Linux+ XK0-005 exam, this scenario tests your ability to troubleshoot boot hangs caused by lengthy filesystem checks, often after a kernel or package update. A common trap is confusing this with editing `/etc/fstab` or using `tune2fs`, which are permanent changes; the exam emphasizes that `fsck.mode=skip` is the most efficient one-time solution for skipping fsck during boot. To remember it, think of the kernel parameter as a "skip pass" for the filesystem check line—just add it to the GRUB boot entry and you're through.
XK0-005 Troubleshooting Practice Question
This XK0-005 practice question tests your understanding of troubleshooting. 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.
A SysAdmin is investigating a server that has become unresponsive. The server was working fine, but after a recent update, it hangs during boot, showing 'A start job is running for /dev/mapper/rootvg-rootlv (xxs / no limit)'. This indicates a filesystem check is taking long. What is the most efficient way to skip the fsck and boot quickly?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Use the kernel parameter 'fsck.mode=skip'.
Option C is correct because the kernel parameter 'fsck.mode=skip' instructs systemd to skip all filesystem checks during boot, allowing the server to bypass the stuck fsck job and start quickly. This is the most efficient method for a one-time skip without permanently altering configuration files.
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.
✗
At boot, press Ctrl+D to continue.
Why it's wrong here
Ctrl+D is not a standard method to skip fsck; it usually sends EOF.
✗
Boot into single-user mode and run fsck.
Why it's wrong here
This runs the filesystem check, not skipping it.
✓
Use the kernel parameter 'fsck.mode=skip'.
Why this is correct
This parameter temporarily skips all filesystem checks for the current boot.
Related concept
Read the scenario before looking for a memorised answer.
✗
Edit /etc/fstab to set the sixth field to 0 for the root filesystem.
Why it's wrong here
This permanently disables fsck on that filesystem, which may be undesirable.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates may confuse the permanent /etc/fstab sixth field (which controls fsck frequency) with the temporary kernel parameter, or incorrectly think that Ctrl+D or single-user mode will skip the check, when in fact they do not bypass the stuck job.
Detailed technical explanation
How to think about this question
The 'fsck.mode=skip' parameter is handled by systemd-fsck@.service, which checks the kernel command line for this option and skips the fsck pass entirely. This is useful in scenarios where a filesystem check is stuck due to a large volume or a corrupted journal, and the administrator needs immediate access to the server for recovery or rollback. The parameter can also be set temporarily at the GRUB prompt by editing the kernel line.
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.
Troubleshooting — This question tests Troubleshooting — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Use the kernel parameter 'fsck.mode=skip'. — Option C is correct because the kernel parameter 'fsck.mode=skip' instructs systemd to skip all filesystem checks during boot, allowing the server to bypass the stuck fsck job and start quickly. This is the most efficient method for a one-time skip without permanently altering configuration files.
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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