The subst command lets you substitute a virtual drive letter for another drive letter on your computer.

Availability

Subst is an external command that is available for the following Microsoft operating systems as subst.exe.

  • Availability

  • Subst syntax

  • Subst examples

  • MS-DOS 3.1x and above

  • Windows 95

  • Windows 98

  • Windows ME

  • Windows NT

  • Windows 2000

  • Windows XP

  • Windows Vista

  • Windows 7

  • Windows 8

  • Windows 10

  • Windows 11

Subst syntax

Associates a path with a drive letter.

SUBST [drive1: [drive2:]path] SUBST drive1: /D

Type SUBST with no parameters to display a list of current virtual drives.

Subst examples

subst a: .

Sets the current directory and subdirectories as the A: drive. So, if you were to type A: after executing this command, you would see everything in the directory from which the command was run.

If you reboot the computer, any subst command is cleared unless it was placed into autoexec.bat or another location that’s executed upon starting the computer.

You cannot subst network drives and after a drive is created, you cannot give the new drive a new label.