The
mkinitramfs
script generates an initramfs image.
The initramfs is a gzipped cpio archive. The archive can be used on a
different box of the same arch with the corresponding Linux kernel.
mkinitramfs
is meant for advanced usage. On your local box
update-initramfs
should do all necessary steps.
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
-d confdir
Set an alternate configuration directory.
-k
Keep the temporary directory used to make the image.
-o
outfile
Write the image to
outfile
.
-r root
Override the
ROOT
setting in
initramfs.conf.
--supported-host-version=hversion
This option queries if mkinitramfs can create ramdisks on a running kernel of version
hversion
.
--supported-target-version=tversion
This option queries if mkinitramfs can create ramdisks for kernel version
tversion
.
FILES
/etc/initramfs-tools/initramfs.conf
The default configuration file for the script. See
initramfs.conf(5)
for a description of the available configuration parameter.
/etc/initramfs-tools/modules
Specified modules will be put in the generated image and loaded when the system boots. The format - one per line - is identical to that of
/etc/modules,
which is described in
modules(5).
/etc/initramfs-tools/conf.d
The conf.d directory allows to hardcode bootargs at initramfs build time
via config snippets. This allows to set ROOT or RESUME.
This is especially useful for bootloaders, which do not pass an root bootarg.
/etc/initramfs-tools/DSDT.aml
If this file exists, it will be appended to the initramfs in a way that causes
it to be loaded by ACPI.
