FirstTry
Objective 4.1XK0-005

4.1 Given a scenario, analyze and troubleshoot storage issues.

Objective 4.1 sits in Troubleshooting, which carries 28% of the Linux+ exam. The questions below are original, written from the official objective title above, and each explanation cites the CompTIA page it rests on.

Objective title verbatim from the official objectives. CompTIA exam page ↗

A worked example

Shown solved, with the whole explanation open: this is what every question here carries.

4-1TroubleshootingModerate

Users report they cannot save files:

$ df -h
Filesystem Size Used Avail Use% Mounted on
/dev/sda1   20G  20G   20K 100% /
/dev/sdb1  100G  40G   60G  40% /data

Which filesystem is out of space?

/data/data is only 40% used with 60G free, so it is not the problem.
BothOnly / is full; /data has ample space.
/Correct · your answerCorrect: / shows 100% Use with almost no Avail.
Neither/ is clearly at capacity, so a filesystem is indeed full.

Correct.

Concept

The Use% column and the Avail figure tell which mount is exhausted, and writes fail on whichever filesystem holds the target path.

Why C

The root filesystem / is at 100% with only 20K available, so it is full; /data at 40% still has room.

Source

#troubleshooting#storage#df

Now you: objective 4.1 questions

No account needed. The explanation opens when you answer.

Sample question 1 of 3

4-1TroubleshootingHard

An administrator sees / at 60% used in df -h, yet writes fail with No space left on device. Which command reveals the real cause?

Sample question 2 of 3

4-1TroubleshootingModerate

The / filesystem is full and an administrator must find which directory under /var is consuming the space. Which command helps most?

Sample question 3 of 3

4-1TroubleshootingHard

Before repairing a suspected corrupt filesystem on /dev/sdb1 with fsck, what must the administrator ensure?

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Read the sources

These are the official pages the questions above cite. Reading them is studying the objective from the primary source, which is what the explanations point you toward anyway.

More objectives in Troubleshooting