Start>Run> "command" >ok
Introduction to MS-DOS
•It is a popular operating system software, designed by Microsoft Corporating for the users of IBM.
•It is developed for disk drives.
•It is a Text User Interface (TUI)
•It is a set of programs that manages the flow of information to and form various parts of computer system.
•It is single user interface operating system.
Assencial files of MS-DOS
•IO. Sys •MSDOS.SYS •COMMAND.COM
Internal Command:
Internal Command:
•Internal commands are parts of the MS-DOS command interpreter.
•They are small routines and are stored within the command.com file.
•Internal commands can be used as soon as you boot the computer.
Examples of Internal Command
•Dir •RD •Cls •MD•Exit •CD •Vol •Date
•Ver •Time •Rename •Path
•Ver •Time •Rename •Path
•Copy •Prompt •Del •Break
•Type •Pause •Copy Con •Echo
External Command:
External Command:
•External commands are stored on disk as program files.
•They are not part of command.com file.
•External commands need their own file having extension.com or .exe or .bat.
Examples of External Command:
•Chkdsk •Tree •Attrib •Diskcopy
•Deltree •Print •Format •Mem
•More • Label •Edit • Scandisk
•Sys •Xcopy •Disk •comp
Use for Internal Commands:
The Dos commands are not case sensitive and ¿sign indicates the Enter key.
•They are not part of command.com file.
•External commands need their own file having extension.com or .exe or .bat.
Examples of External Command:
•Chkdsk •Tree •Attrib •Diskcopy
•Deltree •Print •Format •Mem
•More • Label •Edit • Scandisk
•Sys •Xcopy •Disk •comp
Use for Internal Commands:
The Dos commands are not case sensitive and ¿sign indicates the Enter key.
•Date:
▫This command displays system date and lets user to modify it.
–Syntax: Date
–Ex: C:\date ¿
▫This command displays system date and lets user to modify it.
–Syntax: Date
–Ex: C:\date ¿
The Current date is: Sat 09/04/2010
–Enter the new date: <mm/dd/yy> change the date as per givenformat, otherwise press Enter key.
