X-Git-Url: https://git.grml.org/?p=grml-live.git;a=blobdiff_plain;f=docs%2Fgrml-live.txt;h=dc3d12f89a3d1c7d333aa0f02422b35431fba121;hp=33466b3586c1426f3e291a5bcb25d4b294a91fd7;hb=32f61ffa7a0fa029ed9686f20b45edff9da410fd;hpb=cfd32a33aab0d28608bba9e34c65b2a1967be9b7 diff --git a/docs/grml-live.txt b/docs/grml-live.txt index 33466b3..dc3d12f 100644 --- a/docs/grml-live.txt +++ b/docs/grml-live.txt @@ -3,87 +3,290 @@ grml-live(8) Name ---- -grml-live - generate a grml (based) live-cd + +grml-live - build framework based on FAI for generating a grml and Debian based +Linux Live system (CD/ISO) Synopsis -------- -grml-live [ todo...] + +grml-live [-a ] [-c ] [-g ] [-i ] +[-o ] [-r ] [-s ] [-t +] [-v ] [-bFVhuz] ******************************************************************************* -Important! grml-live is under heavy construction and everything but ready yet. +Important! This document is growing as requested. If you have questions which +aren't answered by this document yet please let me know: ! +This document currently applies to grml-live version 0.4. ******************************************************************************* -Introduction ------------- +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. -grml-live provides the build system for creating a grml (based) live-cd. The -build system is based on link:http://www.informatik.uni-koeln.de/fai/[FAI] -(Fully Automatic Installation). If you are familiar with FAI already it is very -easy to get a live-cd, if you don't know FAI yet don't despair: it's still very -easy. :) +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! -FAI uses a class based system. This gives you the flexibility to choose the -packages you would like to include on your very own live-cd without having to -deal with all the details in the core of the system. +[NOTE] Please notice that you should have a fast network connection as all the Debian -packages will be installed via network. If you want to use a local mirror -checkout -link:http://www.informatik.uni-koeln.de/fai/download/mkdebmirror[mkdebmirror] -and debmirror. +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), apt-cacher(1) 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 +------- + + -a **ARCHITECTURE**:: + +Use the specified architecture instead of the currently running one. This +allows building a 32bit system on a 64bit host (though you can't build a 64bit +system on a 32bit system/kernel of course). Please notice that real +crosscompiling (like building a ppc system on x86) isn't possible due to the +nature and the need of working in a chroot. Currently supported values: i386 +and amd64. + + -b:: + +Build the ISO without updating the chroot via FAI. This option is useful for +example when working on stable releases: if you have a working base +system/chroot and do not want to execute any further updates (via "-u" option) +but intend to only build the ISO. + + -c **CLASSES**:: + +Specify the CLASSES to be used for building the ISO via FAI. By default only +the classes GRMLBASE, GRML_SMALL and I386 are assumed, resulting in a small base +system (being about ~150MB total ISO size). If using a non-I386 system (like +amd64) you should specify the appropriate architecture as well. Additionally you +can specify a class providing a grml-kernel (see +/etc/grml/fai/config/package_config/ for a full list). So instead of GRML_SMALL +you can also use GRML_MEDIUM and GRML_FULL instead. + + -C **CONFIGURATION_FILE**:: + +The specified file is used as configuration file for grml-live. By default +/etc/grml/grml-live.conf is used for main configuration. If a file named +/etc/grml/grml-live.local exists it is used as well (sourced after reading +/etc/grml/grml-live.conf to allow overriding settings). As a last option the +specified configuration file is sourced so it is possible to override settings +of /etc/grml/grml-live.conf as well as of /etc/grml/grml-live.local. Please +notice that all configuration files have to be adjusted during execution of +grml-live, so please make sure you use /etc/grml/grml-live.conf as a base for +your own configuration file. Please also notice that the configuration file +specified via this option is **not** (yet) supported inside the +scripts/hooks/classes at /etc/grml/fai/config. Instead use +/etc/grml/grml-live.conf and/or /etc/grml/grml-live.local for configuration +stuff used inside /etc/grml/fai/config. + + -F:: + +Force execution and do not prompt for acknowledgment of configuration. + + -g **GRML_NAME**:: + +Set the grml flavour name. Common usage examples: grml, grml-small, grml64. +Please do NOT use blanks inside GRML_NAME, otherwise you might notice problems +with booting. + + -h:: + +Display short usage information and exit. + + -i **ISO_NAME**:: + +Specify name of ISO which will be available inside $OUTPUT_DIRECTORY/grml_isos +by default. + + -o **OUTPUT_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). + + -r **RELEASENAME**:: + +Specify name of the release. + + -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. + + -t **TEMPLATE_DIRECTORY**:: + +Specify place of the templates used for building the ISO. By default +(and if not manually specified) this is /usr/share/grml-live/templates/. + + -u:: + +Update existing chroot instead of rebuilding it from scratch. This option is +based on the softupdate feature of FAI. -How to get your own live-cd - the easy, fast and simple way ------------------------------------------------------------ + -v **VERSION_NUMBER**:: -To get a small, Debian-stable and grml based live-cd: +Specify version number of the release. - # export LANG=C ; export LC_MESSAGES=C - # TARGET="/grml/chroot/grml_uncompressed" - # CDDIR="/grml/chroot/grml_cd" - # mkdir -p $TARGET + -V:: - # fai -v -C /etc/grml/fai -cGRML dirinstall $TARGET - # mksquashfs $TARGET/* $CDDIR/live/grml.squashfs -noappend - # cd $CDDIR - # mkisofs -V "my personal grml" -l -r -J -no-emul-boot -boot-load-size 4 \ - -boot-info-table -c boot/isolinux/boot.cat \ - -b boot/isolinux/isolinux.bin -o /grml/grml.iso . +Increase verbosity in the build process. -(TODO: provide the contenct of /grml/chroot/grml_cd through the package -grml-live, in the meanwhil get the content from a current grml-ISO) + -z:: + +Use ZLIB instead of LZMA compression in mksquashfs part of the build process. + +Usage examples +-------------- + +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 -s sid -c GRMLBASE,GRML_SMALL,I386 -o /home/mika/grml-live + +To get a medium sized, Debian-unstable and grml-based Live-CD for i386 +architecture using /grml/grml-live as build and output directory just run: + + # grml-live -s sid -a i386 -c GRMLBASE,GRML_MEDIUM,I386 + +To get a small, Debian-unstable and grml-based Live-CD using /tmp as build and +output directory and use grml_0.0-3.iso as ISO name (placed inside +/tmp/grml_isos) just invoke: + + # grml-live -o /tmp -c GRMLBASE,GRML_SMALL,I386 -s sid -i grml_0.0-3.iso + +[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 use another directory for $CHROOT_OUTPUT, +$BUILD_OUTPUT and $ISO_OUTPUT 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 dependent class which provides the kernel +(being 'I386' for x86_32 and 'AMD64' for x86_64) and a GRML_* class (like +GRML_SMALL, GRML_MEDIUM or GRML_FULL). 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,GRML_SMALL,I386" inside /etc/grml/grml-live.conf to +CLASSES="GRMLBASE,GRML_SMALL,I386,FOOBAR" or invoke grml-live using the classes +option: "grml-live -c GRMLBASE,GRML_SMALL,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/). + +Available classes +----------------- + +Documentation to be done... 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). /usr/share/doc/fai-doc/fai-guide.html/ch-config.html also provides -documentation regarding configuration possibilities. +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 which specifies where all the configuration files and -scripts for FAI/grml-live can be found. By default it is +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 -TODO +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 -TODO +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 ISO. If you want to use a local mirror you have -to adjust this file. +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/ @@ -101,42 +304,262 @@ through files. /etc/grml/fai/config/hooks/ -This directory provides files for customizing the build process through 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/ -File with lists of software packages to be installed or removed. The different -classes describe what should find its way to your ISO. When running 'fai -v -C -/etc/grml/fai -cGRML dirinstall ...' only the files from the directory GRML/ -will be taken, if you use 'fai -v -C /etc/grml/fai -cGRML,FOOBAR dirinstall ...' -then the files of GRML/ **plus** the files from FOOBAR/ will be taken. So just -create a new class to adjust it to your needs. Please notice that the directory -GRML contains a package list defining a minimum but still reasonable package -configuration. +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,GRML_SMALL,I386 ..." only the configuration of GRMLBASE, +GRML_SMALL and and I386 will be taken. If you use 'grml-live -c +GRMLBASE,GRML_SMALL,I386,FOOBAR ...' then the files of GRMLBASE, GRML_SMALL, +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/ -Scripts for customising the ISO within build process. +Scripts for customising the ISO within the build process. + + /etc/grml/fai/files/ + +This directory provides files used inside the scripts of +/etc/grml/fai/config/scripts/*. For a full documentation what happens with the +files please refer to the source of the scripts. /etc/grml/fai/live-initramfs/ This directory provides the files used for building the initramfs/initrd via live-initramfs(8). -TODO ----- +Available log files +------------------- + +grml-live itself logs to /var/log/grml-live.log. Unless you set ZERO_LOGFILE in +/etc/grml/grml-live.conf the output is appended to the file. If you set the +ZERO_LOGFILE configuration option the logfile will be truncated on each new +invocation of grml-live. + +The FAI part of grml-live logs to /var/log/fai/$HOSTNAME/ - so the +default being /var/log/fai/grml/. + +If you are using the grml-live buildd you will find the logs of the grml-live +run at /var/log/grml-buildd.stdout and /var/log/grml-buildd.stderr. + +Requirements for the build system +--------------------------------- + +* any Debian based system should be sufficient (if not it's a bug, so please +send us a bug report then) [a usual link:http://grml.org/grml2hd/[grml2hd] +harddisk installation ships all you need] + +* enough free disk space; at least 800MB are required for a minimal grml-live +run (\~400MB for the chroot [$CHROOT_OUTPUT], \~150MB for the build target +[$BUILD_OUTPUT] and \~150MB for the resulting ISO [$ISO_OUTPUT] plus some +temporary files), if you plan to use GRML_FULL you should have at least 4GB of +total free disk space + +* fast network access for retreiving the Debian packages used for creating the +chroot (check out "local mirror" and "NFSROOT" to workaround this problem as far +as possiblbe) + +FAQ +--- + +Help, I'm using Debian etch and I don't have FAI version >3.2 +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + + wget http://www.informatik.uni-koeln.de/fai/download/etch/fai-client_3.2.4_all.deb \ + http://www.informatik.uni-koeln.de/fai/download/etch/fai-server_3.2.4_all.deb \ + http://www.informatik.uni-koeln.de/fai/download/etch/fai-doc_3.2.4_all.deb + dpkg -i fai-client_3.2.4_all.deb fai-server_3.2.4_all.deb fai-doc_3.2.4_all.deb + +or check out the link:http://www.informatik.uni-koeln.de/fai/[FAI-homepage] for +further details. + +I've problems with the build process. How to start debugging? +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +Check out the logs inside /var/log/fai/... If you don't have the time to debug +the problem in further detail or don't know how to proceed just send a copy of +your config, logs and the commandline with a short problem description to +: + + # history | grep grml-live > /etc/grml/grml_live.cmdline + # tar zcf grml_live_problem.tar.gz /etc/grml/grml-live.conf \ + /etc/grml/grml-buildd.conf /var/log/fai /etc/grml/fai + +Can I use my own (local) Debian mirror? +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +Sure. Just adjust the variables GRML_LIVE_SOURCES and FAI_DEBOOTSTRAP (if not +already using NFSROOT's base.tgz) inside /etc/grml/grml-live.conf according to +your needs. Please don't forget that you should use the grml servers as well +(see default configuration) so all the grml packages can be downloaded as well. + +If you want to use a local (for example NFS mount) mirror additionally, just +adjust MIRROR_DIRECTORY and MIRROR_SOURCES inside /etc/grml/grml-live.conf as +well. + +Unless you specify GRML_LIVE_SOURCES and/or FAI_DEBOOTSTRAP the default from +/etc/grml/fai/apt/sources.list and /etc/grml/fai/make-fai-nfsroot.conf will be +taken. If you customise the variables in /etc/grml/grml-live.conf then the two +files will be adjusted during runtime automatically. + +If MIRROR_DIRECTORY and MIRROR_SOURCES are specified the local mirror will be +taken as first entry in the generated sources.list so it's prefered over +non-local mirrors. Using a fallback mirror (via providing several mirrors in +GRML_LIVE_SOURCES as used by default) is a recommended setting. + +How do I add additional Debian package(s) to my CD/ISO? +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +Just create a new class (using the package_config directory): + + # cat > /etc/grml/fai/config/package_config/MIKA << EOF + PACKAGES aptitude + + vim + another_name_of_a_debian_package + and_another_one + EOF + +and specify it when invoking grml-live then: + + # grml-live -c GRMLBASE,GRML_SMALL,I386,MIKA + +I fscked up my grml-live configuration. How do I reset it to the defaults? +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +Notice: this deletes all your grml-live configuration files. If that's really +what you are searching for just run: + + rm -rf /etc/grml/fai /etc/grml/grml-live.conf + dpkg -i --force-confnew --force-confmiss /path/to/grml-live_..._all.deb + +[NOTE] + +If you don't control your /etc using a version control system (VCS) yet it's a +good chance to start using it now. Check out +link:http://michael-prokop.at/blog/2007/03/14/maintain-etc-with-mercurial-on-debian/[http://michael-prokop.at/blog/2007/03/14/maintain-etc-with-mercurial-on-debian/] +for more details how to maintain /etc using the mercurial VCS. + +How do I create a base.tgz for use as NFSROOT? +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +First of all build the chroot system: + + mkdir /tmp/nfsroot && cd /tmp/nfsroot + debootstrap etch /tmp/nfsroot/ http://ftp.de.debian.org/debian + tar zcf base.tgz ./ + +Then check out where your NFSROOT is located: + + # grep '^NFSROOT' /etc/grml/fai/make-fai-nfsroot.conf + NFSROOT=/grml/fai/nfsroot + +So as /grml/fai/nfsroot is your NFSROOT place the file under +/grml/fai/nfsroot/live/filesystem.dir/var/tmp/: + + mv base.tgz /grml/fai/nfsroot/live/filesystem.dir/var/tmp/base.tgz + +or even better use /etc/grml/fai/config/basefiles/$CLASSNAME.tar.gz instead. +Use I386 as $CLASSNAME for i386 builds and AMD64 for amd64 builds. + +Now running "grml-live ..." will use this file as main system instead of +executing debootstrap. Check out the output for the following lines if using +NFSROOT: + + [...] + Calling task_extrbase + Unpacking Debian base archive + Extracting /grml/fai/nfsroot/live/filesystem.dir/var/tmp/base.tgz + Calling task_mirror + [...] + +or if using /etc/grml/fai/config/basefiles/$CLASSNAME.tar.gz for: + + [...] + ftar: extracting /etc/grml/fai/config/basefiles///AMD64.tar.gz to + /grml-live/grml-live_20071029.22138/grml_chroot// + [...] + +Set up apt-cacher for use with grml-live +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +Make sure /etc/grml/grml-live.conf provides according GRML_LIVE_SOURCES and +FAI_DEBOOTSTRAP: + + # cat /etc/grml/grml-live.conf + [...] + GRML_LIVE_SOURCES=" + deb http://localhost:3142/deb.grml.org grml-stable main + deb http://localhost:3142/deb.grml.org grml-testing main + deb http://localhost:3142/ftp.de.debian.org/debian etch main contrib non-free + " + [...] + FAI_DEBOOTSTRAP="etch http://localhost:3142/ftp.de.debian.org/debian etch main contrib non-free" + +Make sure apt-cacher is running (/etc/init.d/apt-cacher restart). That's it. +All downloaded files will be cached in /var/cache/apt-cacher/ now. + +Set up approx for use with grml-live +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +Make sure /etc/grml/grml-live.conf provides according GRML_LIVE_SOURCES and +FAI_DEBOOTSTRAP: + + # cat /etc/grml/grml-live.conf + [...] + GRML_LIVE_SOURCES=" + deb http://localhost:9999/grml grml-stable main + deb http://localhost:9999/grml grml-testing main + deb http://localhost:9999/debian etch main contrib non-free + " + FAI_DEBOOTSTRAP="etch http://localhost:9999/debian" + +Configure approx: + + # cat /etc/approx/approx.conf + [...] + debian http://ftp.at.debian.org/debian + grml http://deb.grml.org/ + +Don't forget to restart approx (/etc/init.d/approx restart). That's it. +All downloaded files will be cached in /var/cache/approx now. + +I've a question which isn't answered by this document +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +Don't hesitate to ask on IRC (channel #grml on irc.freenode.org) or just drop me +a mail: + +Download / install grml-live as a Debian package +------------------------------------------------ + +Debian packages are available through the grml-repository at +link:http://deb.grml.org/pool/main/g/grml-live/[deb.grml.org]. If you want to +build a Debian package on your own (using for example a specific version or the +current development tree), just execute: + + hg clone http://hg.grml.org/grml-live + cd grml-live + debuild -us -uc -* provide a wrapper script which runs all the necessary command in a single run -(named grml-live plus configuration file /etc/grml/grml-live.conf) +Source +------ -* replace 192.168.... inside the configuration files for the Debian mirro with -something generic and make it configurable +The source of grml-live is available at +link:http://hg.grml.org/grml-live/[http://hg.grml.org/grml-live/] -* provide buildprocess for boot/isolinux stuff +TODO list +--------- -* explain and provide configuration for use of NFSROOT +Check out link:http://wiki.grml.org/doku.php?id=grml-live[grml-live@grml-wiki] +for details. Bugs ---- @@ -148,3 +571,6 @@ Authors ------- Michael Prokop . +///////////////////////////////////// +// vim:ai tw=80 ft=asciidoc expandtab +/////////////////////////////////////