Efi shell tips and tricks

EFI shell commands

Type	Command	Description	Notes
Boot Commands — EFI Shell. Commands related to nPartition booting	autoboot	Set/view autoboot timeout variable
	bcfg	Display/modify the driver/boot configuration
	boottest	Set/view BootTest bits
	dbprofile	Display/modify direct boot profiles for use by lanboot
	lanboot	Boot over the LAN
	reconfigreset	Reset the system (nPartition) for reconfiguration, the nPartition remains inactive, in the shutdown for reconfig state
	reset [-w|-s] [string]	Reset the system (nPartition)
	search	Connect drivers for bootables devices
Configuration Commands — EFI Shell. Commands for changing and retrieving system (nPartition) information	acpiconfig	Set/view ACPI configuration mode
	cellconfig	Deconfigure/reconfigure cells. (Set cell use-on-next-boot values.)
	cpuconfig	Deconfigure/reconfigure processors and processor cores
	date	Display the current date or set the date of the system (nPartition).
	dimmconfig	Deconfigure/reconfigure memory (DIMMs).
	err	Display/change the error level
	errdump	View/clear logs
	fru	View FRU data
	info	Display hardware information
	monarch	Set/view a monarch processor
	palproc	Make a PAL call
	romdrivers	Enable/disable PCI expansion ROM drivers
	rootcell	Set/view preferred root cells (Set nPartition core cell choices.)
	salproc	Make a SAL call
	tftp	Performs TFTP operation to a bootp/DHCP enabled Unix boot server
	time	Display the current time or set the time of the system (nPartition). EFI time is set and presented in GMT (Greenwich mean time).
	variable	Save/restore specific EFI variables
	ver	Display the version information
Device, Driver, and Handle Commands — EFI Shell. Commands for managing devices, drivers, and handles	baud	View serial port com settings
	connect	Bind a driver to a device
	dblk	Hex dump of BlkIo devices
	devices	Display devices managed by EFI drivers
	devtree	Display tree of devices
	dh	Dump handle info
	disconnect	Disconnect driver(s) from device(s).
	drivers	Display list of drivers
	drvcfg	Invoke the Driver Config Protocol
	drvdiag	Invoke the Driver Diagnostics Protocol
	guid	Dump known GUID IDs
	lanaddress	Display MAC address
	load	Load EFI drivers
	LoadBmp –w(seconds)	Displays a Bitmap file onto the screen
	LoadPciRom	Loads a PCI Option ROM image from a file
	map [-r|-v|-d]	Map shortname to device path
	openinfo	Display the open protocols for given handle
	pci	Display PCI devices or PCI function configuration space
	reconnect	Reconnect driver(s) from a device
	unload	Unload a protocol image
Filesystem Commands — EFI Shell. Commands for managing files, directories, and attributes	attrib [+|-][a|s|h|r] file directory	Display/change the attributes of files/directories
	cd	Update/view the current directory
	ls [-b|-r|-a]	Display a list of files and subdirectories in a directory
	mkdir	Create one or more directories. mount Mount a filesystem on a block device
	rm	Delete one or more files/directories. setsize Set the size of a file
	touch	Update time of file/directory with current time
	type [-a|-u] file	Displays the contents of a file (ASCII or Unicode)
	comp	Compare the contents of two files
	cp [-r][-q] src file [dst]	Copy one or more files/directories to another location
	edit	Edit an ASCII or UNICODE file in full screen
	eficompress	Compress infile and write to outfile
	efidecompress	Decompress infile and write to outfile
	hexedit	Edit a file, block device, or memory region using hex
	vol	Display volume information of the file system
Memory Commands — EFI Shell. Commands for listing and managing memory, EFI variables, and NVRAM details. default Set the default NVRAM values	dmem	Dump memory or memory mapped IO
	dmpstore	Display all EFI variables. memmap Display the memory map
	mm	Display/modify MEM/IO/PCI.
	pdt	View/clear nPartition or cell memory page deallocation table (PDT)
Shell Navigation and Other Commands — EFI Shell Commands for basic EFI Shell navigation and customization	alias	Set/get alias settings. cls Clear the standard output with an optional background color
	exit	Exit EFI Shell environment. getmtc Display current monotonic counter value
	help or ?	Display help.
	mode	Display the mode of the console output device
	set [-d|-v|-b] [sname [value]]	Set/Get environment variable.
	xchar	Turn on/off extended character features
Shell Script Commands / Programming Constructs — EFI Shell-script commands	echo	Echo message to stdout or toggle script echo
	else	Script-only: Use with IF THEN
	endfor	Script-only: Delimiter for FOR loop construct
	endif	Script-only: Delimiter for IF THEN construct
	for	Script-only: Loop construct
	goto	Script-only: Jump to label location in script
	if	Script-only: IF THEN construct.
	input	Take user input and place in EFI variable
	pause	Script-only: Prompt to quit or continue
	stall	Stall the processor for some microseconds