LFCS Question #698: Real Exam Question with Answer & Explanation

Question

Which of the following commands changes the number of days before the ext3 filesystem on /dev/sda1 has to run through a full filesystem check while booting?

Options

• Atune2fs -d 200 /dev/sda1
• Btune2fs -c 200 /dev/sda1
• Ctune2fs -i 200 /dev/sda1
• Dtune2fs -n 200 /dev/sda1
• Etune2fs --days 200 /dev/sda1

Explanation

To change the maximum time interval (in days) between filesystem checks for an ext3 filesystem, use the tune2fs command with the -i option.

Common mistakes.

• A. There is no -d option in tune2fs to set the check interval in days; -d typically relates to directory hash algorithms.
• B. tune2fs -c 200 /dev/sda1 sets the maximum mount count between two filesystem checks, not the time interval in days.
• D. There is no -n option in tune2fs that serves the purpose of setting a check interval in days; -n is sometimes used to suppress certain actions or enable no-op mode.
• E. --days is not a valid or recognized option for tune2fs to set the check interval; the correct option for this functionality is -i.

Concept tested. Ext3 filesystem parameter tuning

Reference. https://man7.org/linux/man-pages/man8/tune2fs.8.html

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