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       update-initramfs - generate an initramfs image


       update-initramfs -c|-d|-u [-k version] [-t] [-v] [-b] [-h]


       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


        -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 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    Set an different bootdir for the image creation.

        -h    Print  a  short  help  page  describing the available options in


       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




       The initramfs-tools are written by Maximilian Attems <>,
       Jeff Bailey <> and numerous others.


        initramfs.conf(5), initramfs-tools(8), mkinitramfs(8).