XK0-005 Question #91: Real Exam Question with Answer & Explanation

Question

While creating a file on a volume, the Linux administrator receives the following message: No space left on device. Running the df -m command, the administrator notes there is still 50% of usage left. Which of the following is the NEXT step the administrator should take to analyze the issue without losing data?

Options

• ARun the df -i command and notice the inode exhaustion
• BRun the df -h command and notice the space exhaustion
• CRun the df -B command and notice the block size
• DRun the df -k command and notice the storage exhaustion

Explanation

When a 'No space left on device' error occurs despite free disk space shown by df -m, the next step is to check for inode exhaustion using df -i.

Common mistakes.

• B. df -h shows disk space usage in human-readable format, similar to df -m (megabytes), so it would not reveal the cause if df -m already showed free space.
• C. df -B displays disk usage in a specified block size, which is not relevant to diagnosing the 'no space' error when free space is already confirmed.
• D. df -k shows disk space usage in kilobytes, which again is similar to df -m and would not explain the observed discrepancy.

Concept tested. Linux filesystem inode exhaustion troubleshooting

Reference. https://man7.org/linux/manpages/man1/df.1.html

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