bionic (8) live-update-initramfs.8.gz

Provided by: initramfs-tools_0.130ubuntu3.13_all bug

NAME

       update-initramfs - generate an initramfs image

SYNOPSIS

       update-initramfs -c|-d|-u [-k version] [-t] [-v] [-b directory] [-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 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 one 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  directory
              Set an different bootdir for the image creation.

        -h    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(8), mkinitramfs(8), lsinitramfs(8).