What command is used to summarize the disk usage? A. disk B. du C. fdisk D. chkdsk E. None of the above

The correct answer is: du.

du is a command-line utility for estimating file space usage. It can be used to list the disk usage of files and directories, or to calculate the total disk usage of a directory tree.

disk is a

fdisk is a command-line utility for partitioning disks. It can be used to create, delete, and resize partitions, or to change the type of a partition.

chkdsk is a command-line utility for checking the integrity of a disk. It can be used to scan a disk for errors, and to repair any errors that are found.

None of the above is not the correct answer.