A Linux Administrator Needs to Remove a USB Drive from a System

question 99

Multiple Choice

A Linux administrator needs to remove a USB drive from a system. The unmount command fails, stating the device is busy. Which of the following commands will show the reason for this error?

• A) lsusb | grep /mnt/usb
• B) mount | grep /mnt/usb
• C) ps aux | grep /mnt/usb
• D) lsof | grep /mnt/usb