You want to safely unmount all USB devices mounted under /media/usb*. Which script snippet correctly unmounts all such mounts?

hard📝 Application Q9 of 15

Linux CLI - Disk and Storage

You want to safely unmount all USB devices mounted under /media/usb*. Which script snippet correctly unmounts all such mounts?

Asudo umount /media/usb*

Bfor m in $(mount | grep '/media/usb' | awk '{print $3}'); do sudo umount "$m"; done

Cmount | grep '/media/usb' | umount

Dfor m in /media/usb*; do sudo umount $m; done

Step-by-Step Solution

Solution:

Step 1: Extract mount points under /media/usb
Using mount | grep '/media/usb' | awk '{print $3}' lists all mount point directories matching the pattern.
Step 2: Loop and unmount each mount point
The for loop iterates over each mount point and runs umount safely with sudo.
Final Answer:
for m in $(mount | grep '/media/usb' | awk '{print $3}'); do sudo umount "$m"; done -> Option B
Quick Check:
Loop over mount points and umount each [OK]

Quick Trick: Use mount + grep + awk to list mount points for umount loop [OK]

Common Mistakes:

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