MS-DOS secret and/or unknown commands

Note: Please use these commands cautiously, some of the commands can erase data and/or erase
          data without warning.


ATTRIB ,
The command is short for ATTRIB -a -h -r - s *.* (removes all attributes of a file).

DIR ,
This lists all files including hidden files, does not work in Windows 95 / 98 / NT / 2000.

DIR ...
Lists all directories that do not have extensions. In Windows 95 / Windows 98 will list the contents of the directories previous to the directory currently in.

DOSKEY /APPEDIT
Utilize doskey functions in MS-DOS command utilities such as edlin and debug.

FDISK /MBR
Recreates the Master Boot Record See CH000175 for additional information.

FDISK /PRI
See FDISK Page for additional information.

FDISK /EXT
See FDISK Page for additional information.

FDISK /LOG
See FDISK Page for additional information.

FDISK /Q
Prevents fdisk from booting the system automatically after exiting fdisk.

FDISK /STATUS
Shows you the current status of your hard drives.

FORMAT /AUTOTEST
Formats the hard drive without any prompting.

FORMAT /BACKUP
Like /AUTOTEST but it will ask you for a volume label.

FORMAT /Z:n
Command used with FDISK supporting FAT32, used to specify the cluster size in bytes where n is multiplied by 512.

MEM /A or /ALL
Adds a line into the MEM command tells the available space in HMA.

SET DIRCMD=0
Will make all directories hidden however still accessible, to get them back SET DIRCMD=

SHARE /NC
Unknown

TRUENAME
When placed before a file, will display the whole directory in which it exists.

VER/R
Tells you the Revision and if DOS is inHMA