All DOS commands have already been developed.. You need not to develop any more..
the deleted file if ms dos can be recovered if you use the command mention below immediately,the command is : need External Dos commands and internal dos commands with their meaning
A listing of DOS commands are available if you type help at the command prompt. DOS commands do vary from version to version.
"fdisk" command is used for partitioning in DOS.
A complete list of MS-DOS commands can be found here: http://www.computerhope.com/msdos.htm#02
Go to your DOS window and type help, then hit enter. It will list the commands for you with a description of what they do.
There is none. For starters, you have it backwards, DOS actually copied most of its commands from Unix (The rest came from CP/M.), which Linux is inspired by. Commands like "cd" and "dir" were Unix commands long before DOS even existed.
External Commands
You can execute it directly..
DOS and DOS-like commands are still usable in modern versions of Windows, and can sometime be the only way to accomplish a given task.
DOS is an operating system. The DOS prompt is the command line where DOS commands can be run/executed.
Dos commands are used to create or delete directories. The ATTRIB Command is used for locking and unlocking of files.
Internal and external refer to the command's location in relation to the kernel. An internal command is one built into MS-DOS's kernel. Such commands include CD, DEL, and MOVE. These commands cannot be removed from the system, as they are built-in to MS-DOS. In contrast, external commands are programs bundled with MS-DOS, but are not specifically built into the kernel. Such commands can include EDIT, COPY, and QBASIC. These commands previously resided in C:\DOS (where C is the drive letter), but in most versions of Windows, they will be found in C:|Windows\System32\Command (a user should check their system for specifics).