ntloader/docs/utils.md

Utilities

fsuuid

fsuuid is a tool to obtain the UUID of the partition where the WIM/VHD is located.
Useful for rEFInd and other bootloaders that do not support retrieving the filesystem UUID.
⚠️ Administrator privileges are required.

# Get the UUID by drive letter (Windows)
fsuuid.exe D
# Get the UUID by volume path (Windows)
fsuuid.exe \\?\Volume{XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX}
# List all volume paths (Windows)
fsuuid.exe -l
# Get the UUID by device path (Linux)
fsuuid /dev/sdxY

mkinitrd

mkinitrd is a tool to create the initrd.cpio file.
You can use it to create a custom initrd file using bootmgr from other Windows versions.
You can also use cpio to create the initrd file.

# Create initrd.cpio with files from rootfs directory
mkinitrd.exe rootfs initrd.cpio
# Create initrd.cpio using linux utilities 'find' and 'cpio'
find * | cpio -o -H newc > ../initrd.cpio

bmtool

bmtool is a program for extracting bootmgr.exe from bootmgr.