mkinitramfs(8) - phpMan

MKINITRAMFS(8)                          mkinitramfs manual                         MKINITRAMFS(8)



NAME
       mkinitramfs - low-level tool for generating an initramfs image


SYNOPSIS
       mkinitramfs [-d confdir] [-k] -o outfile [-r root] [-v] [version]

       mkinitramfs [--supported-host-version= hversion]

       mkinitramfs [--supported-target-version= tversion]


DESCRIPTION
       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  correspond-
       ing  Linux  kernel.   mkinitramfs  is  meant for advanced usage. On your local box update-
       initramfs calls mkinitramfs with the relevant parameters.  update-initramfs keeps  sha1sum
       of  generated  initramfs.  It takes care to generate backups and eventually runs the boot-
       loader.

       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.


        -v    Set the verbose mode output.


        version
              Set the kernel version of the initramfs image (defaults to the running kernel).


       --supported-host-version=hversion
              This  option queries if mkinitramfs can create ramdisks on a running kernel of ver-
              sion 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 descrip-
              tion 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 boot-
              loaders, 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.


EXAMPLES
       Create an initramfs for current running kernel:


       mkinitramfs -o ~/tmp/initramfs-$(uname -r)

       Create an initramfs for specific kernel and keep builddirs:


       mkinitramfs -k -o ~/tmp/initramfs-2.6.21-686 2.6.21-686

       Debug initramfs creation (check out written logfile)

       sh -x mkinitramfs -o ~/tmp/initramfs-$(uname -r) 2> ~/tmp/log


AUTHOR
       The initramfs-tools are written by Maximilian Attems <maks AT debian.org>, Jeff Bailey <jbai-
       ley AT raspberryginger.com> and numerous others.


SEE ALSO
        initramfs.conf(5), initramfs-tools(8), update-initramfs(8).



                                            2008/08/12                             MKINITRAMFS(8)

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