DOS Internal Commands.

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Internal commands : The Internal commands those commands that are automatically loaded in the memory. Some commonly used DOS Internal Commands.

  1. Cls
  2. Dir
  3. Date
  4. Time
  5. Ver
  6. Copy Con
  7. Type
  8. Ren
  9. Del
  10. MD
  11. CD
  12. RD
  13. Copy
  1. Cls : The purpose of this command is to clear the display screen or redisplay the DOS prompt at the top left corner .
    • Syntax : C : / > Cls
  2. Dir : Its display the list of directories and file on the screen .
    • Syntax : C : / > Dir
      • C : / > Dir /p : Its displays the list of directories and files Page wise .
      • C : / > Dir /w :Its displays the list of directories and files Width wise .
      • C : / > Dir /d : Its displays the list of directories and files in drive D .
      • C : / > Dir filename . extension : Its displays the information of specified file .
      • C : / > Dir filename with wildcards .
    • Wildcards : It is set of special characters wild are used with some commonly used DOS commands there are two type of wild cards.
      • Asterisk (*~)
      • Question mark (?)
      1. Asterisk (*~) : The wild word match with all the characters .
        • C : / > Dir *.* : Will displays all files and directories .
        • C : / > Dir R*.* : Will displays all files stored first character R .
      2. Question mark (?) : This wild card represents a single character that a group or file have in command .
        • C : / > Dir ac.* ~ : Will displays all files having any first character and remaining name has given in command .
        • C : / > Dir ??? R . DOC :Will displays all file having extension DOC and having first three and fourth letter is R .
  3. DATE : Its displays a current system date . User can also change the current date with new date by using this command.
    • Syntax : C : / > date
      • current date is : sun 9-24-2019
      • Enter of new date (dd/mm/yyyy) :-
  4. TIME : Its displays a current system time . User can also change the current time with new time by using this command .
    • Syntax : C : / > time 
      • Current time is 12 : 39 - 48 : 36 p
      • Enter of new Time :-
  5. VER : It display the version of DOS being used currently.
    • Syntax : C : / > ver 
      • MS : DOS version 6 : 20
      • Copy card .
  6. COPYCON : The purpose of this command is to create a file .
    • Syntax : C : / > Copy con filename . extension
      • save the content of file by pressing ctrl + z key combination at the last time of file . File name should not be greater then 11 character s out of which 8 character are for the name and 3 character are for  the extension .
        • Extension is optional :
          • eg : C : / > copy con ram
            • I am a good boy
            • 1. file is copied.
          • C : / >
  7. TYPE : Allows the user to see the content of a file .
    • Syntax : C : / > Type path 
      • eg. : C : / > Type D : / > ramu 
  8. REN : The purpose of this command is to rename the old file name with new file name .
    • Syntax : C : / > ren old filename        New filename
      • eg. : C : / > ren ramu somu 
  9. DEL : The purpose of this command is to delete file . the user can also delete a multiple files by using this command and long with while cards.
    • Syntax : C : / > del filename . extension 
      • eg. : C : / > del ramu.xls
  10. MD : The purpose of this command  is to create a new directly or sub directly i.e sub ordinate to the currently logged directly .
    • Syntax  C : / > md directory  or C : / > md sub directory
      • eg. : C : / > md College   ( Now user wants to create a sub directory first year in college directory then)
        • C:/>cd College
        • C:/>college >md  First year
  11. CD : The purpose of this command is to change from one directory two other directory or sub-directory.
    • Syntax : C : / > cd directory name 
      • eg. :  C:/>cd College 
        •  C:/> college  > cd First year
        • C:/>college > First year >   
          ( If the user wants to move to the parents directory then use CD command as )
        • C:/>college > First year > cd ............
  12. RD : The purpose of this command is to remove a directory or sub-directory . If the user wants to remove a directory or sub-directory then delete the all files in the sub-directory and then remove sub-directory and then remove a main directory. 
  13. COPY : The purpose of this command is to copy one or more specified files to another disk with same file name or different file name.
    • Syntax : C:/> copy source path target path
      • C:/> Copy A :/> ~ *. *~ C:/> chinni

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