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).