Technical data

3. Base configuration
This variable controls how LONG the syslinux boot loader should wait until the default
installation is booted automatically.
The OPT_RECOVER variable of the HD package allows you to activate a function which
enables you to create a recovery installation from a working installation. This recovery
installation can be activated in the boot menu by choosing the recovery version.
If this variable contains the value ’0’, the syslinux boot loader will wait indefinitely until
the user chooses either the default or the recovery installation!
TIME_INFO Default Setting: TIME_INFO=’MEZ-1MESZ,M3.5.0,M10.5.0/3’
Normally, Unix operating systems use the UTC (Coordinated Universal Time) for clocks
running under their control, and so does fli4l. The UTC is consistent around the world
and has to be converted to local time before use. By using TIME_INFO, you provide the
necessary information for fli4l about your time zone, its difference to UTC, and about
daylight saving time. Your local hardware clock must be set to UTC (corresponds to
London Standard Time) in order to make these settinge effective. Alternatively, you may
use the chrony Package which allows fli4l to synchronize its clock with an external time
server (time servers always provide the current time in UTC).
The meaning of the possible settings TIME_INFO are as follows:
TIME_INFO='MEZ-1MESZ,M3.5.0,M10.5.0/3'
• MEZ-1: “MEZ” is the German abbreviation for “Central European Time” (you
could also use “CET” here). The “-1” means that MEZ-1=UTC, i.e. the MEZ is
one hour ahead of UTC.
• MESZ: “MESZ” is the abbreviation for “Central European Summer Time” and
means that fli4l has to handle daylight saving changes. Because no further informa-
tion (“+x” or “-x”) is given, the clock is adjusted forward one hour when reaching
the daylight saving time.
• M3.5.0,M10.5.0/3: This means that the change to the daylight saving time occurs
on the last Sunday in March at two o’clock and that the change to standard time
occurs on the last Sunday in October at three o’clock.
Normally you do not have to touch these settings, unless your fli4l router resides in
another time zone. In this case you have to adjust these settings accordingly. In order
to do this properly, it is helpful to take a look at the specification of the TZ environment
variable which can be found at the following URL:
http://pubs.opengroup.org/onlinepubs/009695399/basedefs/xbd_chap08.html
KERNEL_VERSION Chooses the version of the kernel to be used. According to the contents
of this variable, the kernel and the kernel modules are selected from img/kernel- kernel
version . compression extension and opt/files/lib/modules/ kernel version , respec-
tively. You can also use the suffix “-virt” for newer kernels which activates support for
virtual machines. However, these versions require at least a Pentium processor with
support for PAE.
KERNEL_BOOT_OPTION Default Setting: KERNEL_BOOT_OPTION=”
The contents of this variable is appended to the kernel’s command line defined in sys-
linux.cfg. Some systems require ’reboot=bios’ for proper rebooting, i.e. WRAP systems.
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