Open Source Software

kernel-install(8)



NAME

   kernel-install - Add and remove kernel and initramfs images to and from
   /boot

SYNOPSIS

   kernel-install COMMAND KERNEL-VERSION [KERNEL-IMAGE]

DESCRIPTION

   kernel-install is used to install and remove kernel and initramfs
   images to and from /boot.

   kernel-install will execute the files located in the directory
   /usr/lib/kernel/install.d/ and the local administration directory
   /etc/kernel/install.d/. All files are collectively sorted and executed
   in lexical order, regardless of the directory in which they live.
   However, files with identical filenames replace each other. Files in
   /etc/kernel/install.d/ take precedence over files with the same name in
   /usr/lib/kernel/install.d/. This can be used to override a
   system-supplied executables with a local file if needed; a symbolic
   link in /etc/kernel/install.d/ with the same name as an executable in
   /usr/lib/kernel/install.d/, pointing to /dev/null, disables the
   executable entirely. Executables must have the extension ".install";
   other extensions are ignored.

   An executable should return 0 on success. It may also return 77 to
   cause the whole operation to terminate (executables later in lexical
   order will be skipped).

COMMANDS

   The following commands are understood:

   add KERNEL-VERSION KERNEL-IMAGE
       kernel-install creates the directory
       /boot/MACHINE-ID/KERNEL-VERSION/ and calls every executable
       /usr/lib/kernel/install.d/*.install and
       /etc/kernel/install.d/*.install with the arguments

           add KERNEL-VERSION /boot/MACHINE-ID/KERNEL-VERSION/

       The kernel-install plugin 50-depmod.install runs depmod for the
       KERNEL-VERSION.

       The kernel-install plugin 90-loaderentry.install copies
       KERNEL-IMAGE to /boot/MACHINE-ID/KERNEL-VERSION/linux. It also
       creates a boot loader entry according to the boot loader
       specification in
       /boot/loader/entries/MACHINE-ID-KERNEL-VERSION.conf. The title of
       the entry is the PRETTY_NAME parameter specified in /etc/os-release
       or /usr/lib/os-release (if the former is missing), or "Linux
       KERNEL-VERSION", if unset. If the file initrd is found next to the
       linux file, the initrd will be added to the configuration.

   remove KERNEL-VERSION
       Calls every executable /usr/lib/kernel/install.d/*.install and
       /etc/kernel/install.d/*.install with the arguments

           remove KERNEL-VERSION /boot/MACHINE-ID/KERNEL-VERSION/

       kernel-install removes the entire directory
       /boot/MACHINE-ID/KERNEL-VERSION/ afterwards.

       The kernel-install plugin 90-loaderentry.install removes the file
       /boot/loader/entries/MACHINE-ID-KERNEL-VERSION.conf.

EXIT STATUS

   If every executable returns with 0, 0 is returned, a non-zero failure
   code otherwise.

FILES

   /usr/lib/kernel/install.d/*.install /etc/kernel/install.d/*.install
       Drop-in files which are executed by kernel-install.

   /etc/kernel/cmdline /proc/cmdline
       The content of the file /etc/kernel/cmdline specifies the kernel
       command line to use. If that file does not exist, /proc/cmdline is
       used.

   /etc/machine-id
       The content of the file specifies the machine identification
       MACHINE-ID.

   /etc/os-release /usr/lib/os-release
       The content of the file specifies the operating system title
       PRETTY_NAME.

SEE ALSO

   machine-id(5), os-release(5), Boot loader specification[1]

NOTES

    1. Boot loader specification
       http://www.freedesktop.org/wiki/Specifications/BootLoaderSpec



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