NAME¶
update-initramfs - generate an initramfs image
SYNOPSIS¶
update-initramfs -c
|-d
|-u [
-k version]
[
-t] [
-v] [
-b directory] [
-h]
DESCRIPTION¶
The
update-initramfs script manages your initramfs images on your local
box. It keeps track of the existing initramfs archives in /boot. There are
three modes of operation create, update or delete. You must at least specify
one of those modes.
The initramfs is a gzipped cpio archive. At boot time, the kernel unpacks that
archive into RAM disk, mounts and uses it as initial root file system. All
finding of the root device happens in this early userspace.
OPTIONS¶
- -k version
- Set the specific kernel version for whom the initramfs will be generated.
For example the output of uname -r for your currently running kernel. This
argument is optional for update. The default is the latest kernel version.
The use of "all" for the version string specifies
update-initramfs to execute the chosen action for all kernel
versions, that are already known to update-initramfs.
- -c
- This mode creates a new initramfs.
- -u
- This mode updates an existing initramfs.
- -d
- This mode removes an existing initramfs.
- -t
- Allows one to take over an custom initramfs with a newer one.
- -v
- This option increases the amount of information you are given during the
chosen action.
- -b directory
- Set an different bootdir for the image creation.
- -h
- Print a short help page describing the available options in
update-initramfs.
EXAMPLES¶
Update the initramfs of the newest kernel:
update-initramfs -u
Create the initramfs for a specific kernel:
update-initramfs -c -k 2.6.18-1-686
FILES¶
/etc/initramfs-tools/update-initramfs.conf
AUTHOR¶
The initramfs-tools are written by Maximilian Attems <maks@debian.org>,
Jeff Bailey <jbailey@raspberryginger.com> and numerous others.
SEE ALSO¶
initramfs.conf(5),
initramfs-tools(8),
mkinitramfs(8),
lsinitramfs(8).