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Internal commands of dos


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DOS - Internal Commands of Disk Operating System

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Internal commands of dos

  1. 1. Internal commands Built-in the file called So the file works as an interpreter aswell as contains all the internal commands. e.g. Date, Time, Cls, Dir etc....Date: To display the system date and allows the user to change the system date. mm-dd-yy(month,date and year in 2 digits) ex: c:date current date is:10-23-11 enter new date :Time: => To display the system time and allowes the user to change the system time.The format is hh:mm:ss:ms a/p(hours:minutes:seconds:microseconds am/pm) ex: c:time current time is: 7:00:05.50p enter new time:Clearscreen: To clear the content or text in the screen cls command is used. ex: c:cls
  2. 2. Directory: we can display the list of all the files using dir command. dir is nothing to display allthe files and sub-directories. c:direxample dir/p => it will continue with the next set of files after any key ispressed. dir/w => it will be display in coloumn wise dir/on ----- the files are sorted according to the name of files,in ascendingorder dir/o-n ------ desending order dir/oe --- files are sorted according to the extension of file. dir/od --- files are sorted according to the date &time of creation.recentlycreated file will come first. dir/os--- files are sorted according to the size of file.smallest file will come first dir/o-s ----- files are sorted according to the size of file.largest file will comefirst dir/l --- file names are displayed in lower case letters. dir/b --- bare output. only file names
  3. 3. dir/s --- display all the files and subdirectories recursively.Wild card symbols * refers muliple character. ? refers to a single character.example dir a*.* ==> display all the files with "a" and can have any extension. dir *.txt ==> display all the files with extension directory) we can create subdirectory into the main directory or into some other directory) we can change the current working directory to some other directory.example c:>md projects c:>cd projects c:projects>copy con This command is used to create a new file.whetever we have typed into theterminal is copied into the file name we have specified. ex: c:copy con myfile I want to learn MS DOS ^z 1 file(s) copiedType The type command is used to display all the contents of a file that has been alreadycreated
  4. 4. ex: c:projects>type myfile I want to learn MS DOSdelete If you want to delete or erase a file we can use delete or erase command. ex: c:>del projectscopy We can copy the text of a file into a carbon copy of a document wecan make duplication copy. syntax: copy old file name new file name example c:copy myfile newfile rename we can rename the existing file using the rename or ren command. syntax: ren old file name new file name example c:ren myfile file1LABEL & VOL: You can change the volume label by using LABEL this command. VOL commanddisplays the current volume name and serial number. >label
  5. 5. Deleting directory / folder To remove a directory, it should be empty. syntax RD[Path]<Directory name> example: c:rd myfolderRead more: