Which command, with options, could be used to change an ext2 file system on /dev/hda1 to an ext3 file system?
Which mount option must be used in the example / etc/ fstab entry below, to ensure that a specific filesystem is not mounted when the system is booted?
Which program lists information about files opened by processes and produces output that can be parsed by other programs?
Which command with all parameters and arguments, can be used by root to erase the cron job list for the user fred?