This is used to load as much of MS-DOS as possible above the 640k barrier. This leaves as much free conventional RAM for older programs as possible.
The BACKUP command is used to backup in DOS 6 plus version.
Yes it is used to comment Dos line
"fdisk" command is used for partitioning in DOS.
"time" command.
RD command is used to remove a directory (folder).
You can use "ver" command.
RD command is used to remove a directory (folder).
DIR
The Fdisk command is used to change hard disk partitions in DOS.
PROMPT command is an internal command, which is used to change the MS-DOS prompt. Through, the system displays the prompt bu default, when you start the computer.
You can recover your file by undelete command: undelete <filename>
DOS stands for Disk Operating System. To be useful computers have to have an operating system. The early IBM PC computers used the MS-DOS operating system. A DOS command is an instruction to the DOS operating system. It must be in a specific form. For example, the command DIR told the DOS operating system to list all files. These commands were typed at a place called the DOS command line. There a many such commands.