NAME

       extlinux-update - program to generate EXTLINUX's configuration files

SYNOPSIS

       extlinux-update

DESCRIPTION

       extlinux-update  is  a  tool used to generate the configuration files used by the EXTLINUX
       bootloader. Options can be configured in /etc/default/extlinux.

OPTIONS

       EXTLINUX_UPDATE="true|false"
           This variable specifies if extlinux-update is  allowed  to  modify  the  configuration
           files in /boot/extlinux. Values are either 'true' or 'false', default is 'true'.

       EXTLINUX_ALTERNATIVES="default recovery"
           This  variable  specifies  which  entries  extlinux-update  is  populating. Values are
           'default', 'recovery', 'live', default is 'default recovery'.

       EXTLINUX_DEFAULT="l0"
           This variable specifies the default entry to boot. The name of an  entry  consists  of
           two or three characters. Linux kernel images start with the letter 'l', followed by an
           integer started by '0' for the first kernel version (which is numerically the  highest
           one  in  case  kernel  images  of  more  than  one  linux  version are installed) and,
           optionally, the mode (r for rescue mode, l for live mode). Memdisk entries start  with
           the  letter  'm',  followed by an integer, no optional modes available. The default is
           'l0'.

       EXTLINUX_ENTRIES="all"
           This variables specifies how many kernel versions should be used to populate the  boot
           configuration.  Value  is  an  integer  starting  with 1, or 'all' to populate for all
           kernels, default is 'all'.

       EXTLINUX_MEMDISK="true|false"
           This variable specifies if ISO (*.iso) and HDD (*.img) images should be added  to  the
           EXTLINUX configuration so that they can be booted through memdisk, default is 'true'.

       EXTLINUX_MEMDISK_DIRECTORY="/boot|DIRECTORY"
           This  variable specifies where to look for images to be added to the EXTLINUXs memdisk
           configuration, default is '/boot'.

       EXTLINUX_OS_PROBER="true|false"
           This variable specifies if other operating systems detected  by  os-prober  should  be
           added  to  the  EXTLINUX  configuration  so  that they can be booted via chainloading,
           default is 'true'.

       EXTLINUX_MENU_LABEL="Debian GNU/Linux, kernel"
           This variable specifies the text that is used as a description in the boot menu. Value
           is  an  arbitrary  string.  If  lsb_release  is  installed,  the  distributors  id  is
           automatically determined. If lsb_release is not  available,  it  defaults  to  'Debian
           GNU/Linux, kernel'.

       EXTLINUX_PARAMETERS="ro quiet"
           This  variable  specifies  additional boot parameters that are appended to each kernel
           entry. Value is an arbitrary string,  default  is  'ro  quiet'  (except  for  recovery
           entries, where quiet is avoided).

       EXTLINUX_ROOT="root=DEVICE"
           This  variable  specifies  the  root  partition.  It  is  automatically extracted from
           /etc/fstab. EXTLINUX supports both devices and UUIDs.

       EXTLINUX_THEME="debian"
           This variable specifies the theme that should be used, e.g.  to  display  a  graphical
           boot   menu.   Values   are  either  the  name  of  an  EXTLINUX  theme  installed  in
           /usr/share/syslinux/themes, or the full path to the theme. If no theme should be used,
           the  value  'none'  can  be used. If no theme is specified and themes are not disabled
           through  'none',  and  if  /usr/share/syslinux/themes/debian  is  available,  then  it
           defaults  to  that,  otherwise  the  default  is  empty and no theme is used. For more
           information    about    how     to     install     the     themes     package,     see
           /usr/share/doc/extlinux/README.Debian.

       EXTLINUX_TIMEOUT="50" 4
           This variable specifies the time that EXTLINUX should wait for user input during boot.
           Values are in decisecond greater than  0  (e.g.  '10'  for  a  1  second  timeout),  0
           specifies to wait forever. The default is 50.

FILES

       /etc/default/extlinux

HOMEPAGE

       More   information   about   EXTLINUX   and   the   syslinux   project  can  be  found  at
       <http://syslinux.zytor.com/>.

AUTHOR

       EXTLINUX was written by  H. Peter Anvin <hpa@zytor.com>.

       extlinux-update  and  this  manual  page  was  written  by  Daniel  Baumann  <mail@daniel-
       baumann.ch>fR>.