unmkinitramfs - extract content from an initramfs image
unmkinitramfs [-v] initramfs-file directory
unmkinitramfs -h
The unmkinitramfs command extracts the content of a given initramfs image using cpio. If the image contains multiple segments, each are passed to cpio in order.
Display usage information and exit.
Display verbose messages about extraction.
Extract initramfs content of current running kernel:
unmkinitramfs /boot/initrd.img-$(uname -r) initramfs/
unmkinitramfs cannot deal with multiple-segmented initramfs images, except where an early (uncompressed) initramfs with system firmware is prepended to the regular compressed initramfs.
The initramfs-tools are written by Maximilian Attems <maks@debian.org> and numerous others.
initramfs-tools(7), lsinitramfs(8), mkinitramfs(8), update-initramfs(8).