The MD command is a short form of MKDIR. This internal DOS command creates a subdirectory under the directory you are currently in. Since your computer boots up in the hard disk root directory, the command you just entered created a subdirectory named DOS4 under the root directory.

Note

If you don’t understand the term “root directory” refer to your MS-DOS User’s Guide, “Files and Directories.”

When the computer displays the C> prompt again, enter:

C > D I R

to see what you have done. You should see a directory listing similar to the following:

COMMAND COM XXXXX X-XX-XX X:XXX

FORMAT EXE XXXXX X-XX-XX X:XXX

DOS4

<DIR>

x - x x - x x

x : x x x

X File(s)

XXXXXXXX bytes

free

c >

Just as MS-DOS commands usually look at the “current” disk drive, they also look at the current directory. Since you can change the current, “logged” disk drive, you would expect to be able to change the current, logged directory. You can, using the CD (CHDIR) command. Enter the command series:

6-12 Using Your Hard Disk