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20. Write the DOS command to erase a file named FILEBILL which is stored in the sub-directory named MYFILES located at the ro
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20. del C:\MYFILES\FILEBILL.ext

21. cd \
22. To erase all the files in the current directory, su A, enter
del *.*
If you use this form of the command (to delete all files in a directory), the program will display the prompt
Are you sure (Y/N)?
If you are sure you are deleting the files you want to delete, press the letter Y key to start the erasing process.

23. DELTREE c:\DIRFRED

24. attrib +r a:COMMAND.COM

25. xcopy c:\DIRECT1 a: /s
26. dir /ah

27. EDIT A:\FRED (The MS-DOS editor requires the QBASIC.EXE file to be in the current directory, in the search path or in the same directory as the file EDIT.COM.)

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