extlinux-update - program to generate EXTLINUX's configuration files
extlinux-update is a tool used to generate the configuration files used by the EXTLINUX bootloader. Options can be configured in /etc/default/extlinux.
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'.
This variable specifies which entries extlinux-update is populating. Values are 'default', 'recovery', 'live', default is 'default recovery'.
This variable specifies the default entry to boot. Value is an integer starting with 0 for the first entry, default is '0'.
This variables specifies how many kernel versions should be used to populate the boot configuration. Value is an integer starting with 1, default is '1'.
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'.
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).
This variable specifies the root partition. It is automatically extracted from /etc/fstab. EXTLINUX supports both devices and UIIDs.
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.
This 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.