NAME

       unmkinitramfs - extract content from an initramfs image

SYNOPSIS

       unmkinitramfs [-v] initramfs-file directory
       unmkinitramfs -h

DESCRIPTION

       The  unmkinitramfs command extracts the content of a given initramfs image using cpio and the appropriate
       decompressor command.

       The initramfs image may be a single compressed cpio archive,  or  the  concatenation  of  any  number  of
       uncompressed cpio archives optionally followed by a compressed cpio archive.

       Earlier  versions of this command would in some cases unpack an initramfs consisting of multiple archives
       into multiple subdirectories of the given directory.

OPTIONS

       -h     Display usage information and exit.

       -v     Display verbose messages about extraction.

USAGE EXAMPLES

       Extract initramfs content of current running kernel:

       unmkinitramfs /boot/initrd.img-$(uname -r) initramfs/

BUGS

       unmkinitramfs does not support initramfs images with more than one compressed cpio archive.

AUTHOR

       The initramfs-tools are written by Maximilian Attems <maks@debian.org> and numerous others.

SEE ALSO

       initramfs-tools(7), lsinitramfs(8), mkinitramfs(8), update-initramfs(8).

initramfs-tools                                    2025/03/20                                   UNMKINITRAMFS(8)