update-initramfs

UPDATE-INITRAMFS(8)          System Administration         UPDATE-INITRAMFS(8)

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  un-
       packs  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  cur-
              rently  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  up-
              date-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  up-
              date-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).

initramfs-tools                   2014/10/16               UPDATE-INITRAMFS(8)