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Man page of UNMKINITRAMFS
UNMKINITRAMFS
Section: System Administration (8)
Updated: 2025/03/20
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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.
When the initramfs image includes one or more "early initramfs"
archives, that is uncompressed archives with microcode or other files
that the kernel uses directly, these are extracted to sub-directories
named "early", "early2", etc., and the other archives are
extracted to a sub-directory named "main".
In a future version of initramfs-tools this behaviour may change so
that all archives are extracted directly into 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).
Index
- NAME
-
- SYNOPSIS
-
- DESCRIPTION
-
- OPTIONS
-
- USAGE EXAMPLES
-
- BUGS
-
- AUTHOR
-
- SEE ALSO
-
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