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LFCS · Question #874
LFCS Question #874: Real Exam Question with Answer & Explanation
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Submitted by olafpl· Apr 18, 2026Storage Management
Question
After running the command umount /mnt, the following error message is displayed: umount: /mnt: device is busy. What is a common reason for this message?
Options
- AThe kernel has not finished flushing disk writes to the mounted device.
- BA user has a file open in the /mnt directory.
- CAnother file system still contains a symlink to a file inside /mnt.
- DThe files in /mnt have been scanned and added to the locate database.
- EThe kernel thinks that a process is about to open a file in /mnt for reading.
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Topics
#File Systems#Mount/Umount#Troubleshooting#Device Busy