efivar
UEFI variable management utility
TLDR
List all UEFI variables
$ efivar [-l|--list]
Print contents of a variable$ efivar -n [guid-name] -p
SYNOPSIS
efivar [options]
DESCRIPTION
efivar manages UEFI variables stored in NVRAM. It can list, read, write, and delete EFI variables. These variables contain boot configuration, secure boot settings, and other firmware data.
Useful for debugging UEFI boot issues and inspecting firmware configuration.
PARAMETERS
-l, --list
List all EFI variables-n, --name guid-name
Specify variable by GUID and name-p, --print
Print variable value-w, --write
Write variable value-d, --delete
Delete a variable-a, --append
Append to variable
CAVEATS
Requires root privileges for write operations. Modifying EFI variables incorrectly can prevent system boot. Some variables are protected by Secure Boot.
SEE ALSO
efibootmgr(8), mokutil(1)