+grml-live [-c <classe[s]>] [-t <target_directory>] [-s <suite>] [-Fvh]
+
+*******************************************************************************
+Important! This document is growing as requested. If you have questions which
+aren't answered by this document yet please let me know: <mika@grml.org>!
+*******************************************************************************
+
+Description
+-----------
+
+grml-live provides the build system for creating a grml and Debian based Linux
+Live-CD. The build system is based on
+link:http://www.informatik.uni-koeln.de/fai/[FAI] (Fully Automatic
+Installation). grml-live uses the "fai dirinstall" feature to generate a chroot
+system based on the class concept of FAI (see later sections for further
+details) and provides the framework to be able to generate a full-featured ISO.
+It does not use all the FAI features by default though and you don't have to
+know FAI to be able to use it.
+
+The use of FAI gives you the flexibility to choose the packages you would like
+to include on your very own Linux Live-CD without having to deal with all the
+details of a build process.
+
+CAUTION: grml-live does **not** use /etc/fai for configuration but instead
+provides and uses /etc/grml/fai. This ensures that it does not clash with
+default FAI configuration and packages, so you can use grml-live and FAI
+completely independent at the same time!
+
+[NOTE]
+
+Please notice that you should have a fast network connection as all the Debian
+packages will be downloaded and installed via network. If you want to use a
+local mirror (strongly recommended if you plan to use grml-live more than once)
+checkout mkdebmirror (see /usr/share/doc/grml-live/examples/mkdebmirror),
+debmirror(1), reprepro(1) (see /usr/share/doc/grml-live/examples/reprepro/ for a
+sample configuration) and approx(8). To avoid downloading the base system again
+and again check out FAI's NFSROOT (see FAQ of this document for details).
+
+Options
+-------
+
+ -c **CLASSES**::
+
+Specify the CLASSES to be used for building the ISO via FAI. By default only
+the classes GRMLBASE and I386 are assumed, resulting in a small base system
+(being about ~150MB total ISO size) for x86 (32bit).
+
+ -s **SUITE**::
+
+Specify the Debian suite you want to use for your live-system. Defaults to
+"etch" (being current Debian/stable). Supported values are: etch, lenny, sid,
+stable, testing, unstable.
+
+ -t **TARGET_DIRECTORY**::
+
+Main output directory of the build process of FAI. Some directories are created
+inside this target directory, being: grml_cd (where the files for creating the
+ISO are located, including the compressed squashfs file), grml_chroot (the
+chroot system) and grml_isos (where the resulting ISO is stored).
+
+ -F::
+
+Force execution and do not prompt for acknowledgment of configuration.
+
+ -h::
+
+Display short usage information and exit.
+
+ -v::
+
+Increase verbosity in the build process.
+
+How to get your own Live-CD - the easy, fast and simple way
+-----------------------------------------------------------
+
+To get a small, Debian-stable and grml-based Live-CD using /grml/grml-live
+as build and output directory just run:
+
+ # grml-live
+
+To get a small Debian-unstable and grml-small based Live-CD using
+/home/mika/grml-live as build and output directory just use:
+
+ # grml-live -c GRMLBASE,GRML_SMALL,I386 -t /home/mika/grml-live
+
+[NOTE]
+
+If you have about 700MB of free space inside /dev/shm (being a tmpfs, usually
+you should have >=1GB of RAM) just run "mount -o remount,suid,dev,rw /dev/shm"
+and use /dev/shm as build and output directory - resulting in very fast build
+process. But please be aware of the fact that rebooting your system will result
+in an empty /dev/shm, so please another directory for $CHROOT_TARGET,
+$BUILD_TARGET and $ISO_TARGET if you plan to create more persistent output. :)
+
+Main features of grml-live
+--------------------------
+
+* create a grml-/Debian-based Linux Live-CD with one single command
+
+* class based concept, providing a maximum of flexibility
+
+* supports integration of own hooks, scripts and configuration
+
+* supports use and integration of own Software and/or Kernels via simple use of
+Debian repositories
+
+* native support of FAI features
+
+* multi-arch support (work in progress)
+
+The class concept
+-----------------
+
+grml-live uses FAI and its class based concept for adjusting configuration and
+setup according to your needs. This gives you flexibility and strength without
+losing the simplicity in the build process.
+
+The main and base class provided by grml-live is named GRMLBASE. It's strongly
+recommended to **always** use the class GRMLBASE when building an ISO using
+grml-live, as well as the architecture dependend class which provides the kernel
+(being 'I386' for x86_32 currently only). The following files and directories
+are relevant for class GRMLBASE by default:
+
+ /etc/grml/fai/config/scripts/GRMLBASE/
+ /etc/grml/fai/config/debconf/GRMLBASE
+ /etc/grml/fai/config/class/GRMLBASE.var
+ /etc/grml/fai/config/hooks/instsoft.GRMLBASE
+ /etc/grml/fai/config/package_config/GRMLBASE
+
+Take a look at the next section for information about the concept of those
+files/directories.
+
+If you want to use your own configuration, extend an existing configuration
+and/or add additional packages to your ISO just invent a new class (or extend an
+existing one). For example if you want to use your own class named "FOOBAR" just
+extend CLASSES="GRMLBASE,I386" inside /etc/grml/grml-live.conf to
+CLASSES="GRMLBASE,I386,FOOBAR" or invoke grml-live using the classes option:
+"grml-live -c GRMLBASE,I386,FOOBAR ...".
+
+More details regarding the class concept can be found in the documentation of
+FAI itself (being available at /usr/share/doc/fai-doc/).
+
+Files
+-----
+
+Notice that grml-live ships FAI configuration files that do not use the same
+namespace as the FAI packages itself. This ensures that grml-live does not clash
+with your usual FAI configuration, so instead of /etc/fai/fai.conf (package
+fai-client) grml uses /etc/grml/fai/fai.conf instead. For more details see
+below. To get an idea how another configuration or example files could look like
+check out /usr/share/doc/fai-doc/examples/simple/ (provided by Debian package
+fai-doc). Furthermore /usr/share/doc/fai-doc/fai-guide.html/ch-config.html
+provides documentation regarding configuration possibilities.
+
+ /usr/sbin/grml-live
+
+Script for the main build process. Requires root permissions for execution.
+
+ /etc/grml/grml-live.conf
+
+Main configuration file for grml-live. All the important steps can be configured
+at this stage.
+
+ /etc/grml/fai/fai.conf
+
+Main configuration file for FAI which specifies where all the configuration
+files and scripts for FAI/grml-live can be found. By default it is set to
+FAI_CONFIGDIR=/etc/grml/fai/config, a directory shipped by grml-live
+out-of-the-box so you shouldn't have to configure anything in this file.
+
+ /etc/grml/fai/make-fai-nfsroot.conf
+
+This file is used by make-fai-nfsroot(8) only. Usually you don't have to change
+anything inside this file. If you want to modify NFSROOT though you can adjust
+it there.
+
+ /etc/grml/fai/NFSROOT
+
+This file specifies the package list for creating the NFSROOT.
+
+ /etc/grml/fai/apt/sources.list
+
+This file specifies which mirrors should be used for retreiving the Debian
+packages used for creating the main chroot (including all the software you would
+like to see included). If you want to use a local mirror you either have to
+adjust this file or use the GRML_LIVE_SOURCES variable inside
+/etc/grml/grml-live.conf which modifies /etc/grml/fai/apt/sources.list
+on-the-fly then.
+
+ /etc/grml/fai/config/
+
+The main directory for configuration of FAI/grml-live. More details below.
+
+ /etc/grml/fai/config/class/
+
+This directory contains files which specify main configuration variables for the
+FAI classes.
+
+ /etc/grml/fai/config/debconf/
+
+This directory provides the files for preseeding/configuration of debconf
+through files.
+
+ /etc/grml/fai/config/hooks/
+
+This directory provides files for customising the build process through hooks.
+Hooks are user defined programs or scripts, which are called during the
+installation process.
+
+ /etc/grml/fai/config/package_config/
+
+Directory with lists of software packages to be installed or removed. The
+different classes describe what should find its way to your ISO. When running
+"grml-live -c GRMLBASE,I386 ..." only the files from the directories GRMLBASE
+and I386 will be taken, if you use 'grml-live -c GRMLBASE,I386,FOOBAR ...' then
+the files of GRMLBASE, I386 **plus** the files from FOOBAR will be taken. So
+just create a new class to adjust the package selection according to your needs.
+Please notice that the directory GRMLBASE contains a package list defining a
+minimum but still reasonable package configuration.
+
+ /etc/grml/fai/config/scripts/