NAME

       update-initramfs - generate an initramfs image

SYNOPSIS

       update-initramfs {-c|-d|-u} [-k version] [-v] [-b directory]
       update-initramfs -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 that update-initramfs should
              operate on all installed kernel versions (with -c),  or  on  all  installed  kernel
              versions that already have an initramfs (with -d or -u).

       -c     This mode creates a new initramfs.

       -u     This mode updates an existing initramfs.

       -d     This mode deletes an existing initramfs.

       -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, --help
              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(7), mkinitramfs(8), lsinitramfs(8).