EFI Instructions

Using EFI Basic Instructions for Using the Extensible Firmware Interface (EFI)

Revision 2.0

4. Arrow down to the EFI Shell option and press <Enter>.

5. Press F10 to save this configuration and reset.

Upon booting to the EFI shell, the embedded OS always looks for a file named startup.nsh (by

searching through the defined “path”). Startup.nsh is the equivalent of autoexec.bat in the

DOS/Windows environment. After running this startup script (if found), the following command

line prompt appears:

Shell>

1.3 Basic EFI Commands

EFI commands are very similar to common DOS and Linux commands. The most frequently

used commands include:

 ls (or dir): Lists the directory contents.

 cd: Changes the directory.

 cp: Copies one or more files/directories to another location.

 move: Moves one or more files/directories to the destination.

 rm: Deletes one or more files or directories.

 map: Displays, resets, or deletes mappings with the verbose option.

map –r: Commonly used to refresh mapped drives.

 edit: Starts a basic text editor with on-screen function key help.

 set: Displays (set), creates (set sname value), deletes (set –d), or changes EFI

environment variables.

 cls: Clears the screen and can also change the background color.

 echo: Displays results on the screen.

 help: Displays help information.

 exit: Leaves the EFI shell and returns to the BIOS utility.

 reset: Resets the system with a warm reboot or complete shutdown.

Note: For most commands, EFI is not case sensitive. However, EFI can be case sensitive for

file paths and names depending on the media.

For a full list of commands, see Appendix A.