To allow a regular user account to mount and unmount a filesystem (for instance, a cdrom or floppy), which option need to be added to the corresponding line in /etc/fstab?()
A system administrator is attempting to unmount filesystem /dev/data and receives the following message: umount: 0506-349 Cannot unmount /dev/data: The requested resource is busy. Which of the following commands can be used to determine which process has open references within the filesystem?()
A system administrator is unable to unmount a file system. Which is the appropriate command to determine who or what is accessing the file system?()