Modules and Extensions Quick Start #
SUSE Linux Enterprise Server 15
This Quick Start gives you an overview of the modules and extensions available for the SUSE Linux Enterprise family. Learn about their purpose and features, and how to manage them.
1 Modules and Extensions Explained #
Starting with SUSE Linux Enterprise Server 15, the installation medium consists of only the Unified Installer, a minimal system for deploying, updating and registering SUSE Linux Enterprise Server. During deployment you can add functionality by selecting modules and extensions to be installed on top of the Unified Installer.
Technically, modules and extensions are very similar. Both can be managed
with YaST or the command line tool SUSEConnect
. Both
modules and extensions add a set of online repositories
(main
, update
,
source
, debug
) containing all
necessary packages. Additionally, both may add partitioning proposals and
system roles that can be chosen during deployment.
However, there are significant differences between modules and extensions:
- Modules
Modules allow you to shape the product according to your needs. Each module has a clearly defined scope ranging from tools for Web Development and Scripting, through a Public Cloud, all the way to the SUSE Package Hub, offering community-managed packages.
Modules enable you to provide just the set of packages required for the machine's purpose, making the system lean, fast, and more secure. This modular approach also makes it easy to provide tailor-made images for container and cloud environments.
Modules can be added or removed at any time during the lifecycle of the system, allowing you to easily adjust the system to changing requirements.
Modules are part of your SUSE Linux Enterprise Server subscription and therefore free of charge. They differ from the base of SUSE Linux Enterprise Server only by their lifecycle. With the exception of the SUSE Package Hub module, SUSE provides L3 support for almost all packages provided by modules. For more information about the SUSE Linux Enterprise Server support statement refer to the Release Notes.
- Extensions
Extensions provide advanced capabilities for tasks such as live patching and high availability clustering to SUSE Linux Enterprise Server. They are offered as subscriptions and require a registration key that is liable for costs. Usually, extensions have their own release notes that are available from https://www.suse.com/releasenotes.
1.1 Modules Available for the SUSE Linux Enterprise Product Family #
The following modules are available within the SUSE Linux Enterprise Product Family. Note that the availability of modules depends on the product (refer to the column Available for). For more information about lifecycle, release frequency, and the overlay support period, see https://www.suse.com/lifecycle.
Name |
Module depends on |
Available for |
Support | |||
---|---|---|---|---|---|---|
Content | ||||||
Basesystem |
None |
Default on all products |
| |||
Adds a basic system on top of the Installer. It is
required by all other modules and extensions. The scope of an
installation that only contains the base system is comparable to the
| ||||||
Containers |
Basesystem |
SLES, SLES-SAP, SLE-HPC |
| |||
Contains support, tools and images for containers. | ||||||
Desktop Applications |
Basesystem |
SLED (default), SLE-WE (default), SLES, SLES-SAP, SLE-RT, SLE-HPC |
| |||
Adds a graphical user interface and essential desktop applications to the system. | ||||||
Development Tools |
Basesystem, Desktop Applications |
SLES, SLES-SAP, SLED, SLE-RT, SLE-HPC |
| |||
Contains compilers (including gcc) and libraries required for compiling and debugging applications. Replaces the former Software Development Kit (SDK). | ||||||
High Availability |
Basesystem |
SLES, SLES-SAP (included), SLE-HPC |
| |||
Adds clustering support for mission-critical setups. Tools included are Hawk, crm, Pacemaker, and Corosync. High Availability support is included in subscription for SLES-SAP and therefore available as a module on this product. It is also available as an extension for SLES and SLE-HPC (see below). | ||||||
High Performance Computing |
Basesystem |
SLE-HPC (included) |
| |||
Contains tools and libraries related to High Performance Computing (HPC). | ||||||
Legacy |
Basesystem, Server Applications |
SLES, SLES-SAP | ||||
Helps you migrating applications from earlier versions of SUSE Linux Enterprise Server and other systems to SLES 15, by providing packages which are discontinued on SUSE Linux Enterprise. Packages in this module are selected based on the requirement for migration and the level of complexity of configuration. This module is recommended when migrating from a previous product version. | ||||||
Public Cloud |
Basesystem, Server Applications |
SLES, SLES-SAP, SLE-HPC | ||||
Contains all tools required to create images for deploying SUSE Linux Enterprise Server in cloud environments such as the Amazon Web Services (AWS), Microsoft Azure, Google Compute Platform, or SUSE OpenStack Cloud. | ||||||
SAP Applications |
Basesystem |
SLES-SAP (included) |
| |||
Contains packages specific to SLES-SAP. | ||||||
Server Applications |
Basesystem |
SLES (default), SLES-SAP, SLE-RT, SLE-HPC |
| |||
Adds server functionality by providing network services such as DHCP server, name server, or Web server. This module is selected for installation by default; deselecting it is not recommended. | ||||||
SUSE Cloud Application Platform Tools |
Basesystem |
SLED, SLES, SLES-SAP | ||||
Adds tools allowing you to interact with a SUSE Cloud Application Platform product. | ||||||
SUSE Package Hub |
Basesystem |
All products |
| |||
Provides access to packages for SUSE Linux Enterprise Server maintained by the openSUSE community. These packages are delivered without L3 support but do not interfere with the supportability of SUSE Linux Enterprise Server. For more information, see https://packagehub.suse.com/. | ||||||
Web and Scripting |
Basesystem, Server Applications |
SLES, SLES-SAP, SLE-HPC | ||||
Contains packages intended for a running Web server. |
1 LTSS: Long-Term Service Pack Support |
2 ESPOS: Extended Service Pack Overlay Support |
1.2 Extensions Available for the SUSE Linux Enterprise Product Family #
The following extensions are available within the SUSE Linux Enterprise Product Family. Note that the availability of extensions depends on the product (refer to the column Available for).
Name and Content |
Module Dependency |
Available for |
---|---|---|
Basesystem, Server Applications |
SLES | |
Basesystem |
SLES | |
Basesystem, Desktop Applications |
SLES, SLED (default) |
The Workstation Extension installs the kernel-default-extra package, which includes additional kernel modules for desktop usage and enables loading of unsupported modules. If actually loaded, these modules may compromise your SLE support status.
Please evaluate if your hardware really requires additional kernel modules, and if so, test this expanded driver set in addition to the default set from the kernel-default package for possible configuration conflicts.
To prevent installation of the kernel-default-extra
package, run zypper addlock kernel-default-extra
.
2 Installing and Managing #
Modules and Extensions can be installed when initially setting up the system and also on an existing SUSE Linux Enterprise Server installation.
2.1 Installing Modules and Extensions During the Initial System Setup #
Modules & extensions can easily be installed when setting up the system. The respective steps are part of the installation routine. Following the default installation path, this requires network access to contact the SUSE Customer Center or a local registration server (SUSE Manager or Repository Mirroring Tool), which provide the respective repositories. An offline installation is supported, too. In that case an additional installation media is required. For detailed information refer to Section 8.8, “Extension and Module Selection”.
2.2 Installing and Managing Modules and Extensions from the Running System #
To install modules & extensions from the running system, you need to make sure your system is registered with the SUSE Customer Center or a local registration server. If you have not done so during the installation, refer to Section 9.3, “Registering from the Installed System” for instructions.
After the system has been registered, modules can be added or removed. Refer to Section 9.4, “Managing Modules and Extensions in a Running System” for details.
3 Module Membership of Packages #
By default tools for searching software packages (YaST Software Management
or zypper search
) are restricted to searching within
active repositories. For an extented search including not yet activated
remote repositories, you can run zypper search-packages
.
To find out which module a package belongs to, run
zypper search-packages PACKAGE
If the search-packages
subcommand is not available on
your system, install the package
zypper-search-packages-plugin.
In case Zypper's package search command is not available on your system, you can also use the SUSE Customer Center package search Web interface to check the availability of packages and their respective modules. Visit https://scc.suse.com/packages for this purpose. A SUSE login is not required for this service.
To refine the search results, zypper search-packages
offers the following options:
-
-x
,--match-exact
Searches for exact matches.
-
-g
,--group-by-module
Groups the search results by modules rather than by package name.
-
-d
,--details
Additionally lists version numbers and repositories containing the package.
--xmlout
Generates XML output.
Below are a few examples of how to use zypper
search-packages
.
The following command searches for the packages nodejs
and hawk. The first one is available in the Web
and Scripting
module, while the second one is part of the SUSE Linux Enterprise
High Availability Extension Extension. Both packages are not yet installed:
>
zypper search-packages hawk2 nodejs
Following packages were found in following modules:
Package Module or Repository
------------- --------------------------------------------------------------------
hawk2 SUSE Linux Enterprise High Availability Extension (sle-ha/15/x86_64)
nodejs8 Web and Scripting Module (sle-module-web-scripting/15/x86_64)
nodejs8-devel Web and Scripting Module (sle-module-web-scripting/15/x86_64)
nodejs8-docs Web and Scripting Module (sle-module-web-scripting/15/x86_64)
nodejs-common Web and Scripting Module (sle-module-web-scripting/15/x86_64)
To activate the respective module or product, use SUSEConnect --product.
Use SUSEConnect --help for more details.
If you know the exact package names, you can narrow the results down to
exact matches by using the option -x
:
>
zypper search-packages -x hawk2 nodejs8
Following packages were found in following modules:
Package Module or Repository
------- --------------------------------------------------------------------
hawk2 SUSE Linux Enterprise High Availability Extension (sle-ha/15/x86_64)
nodejs8 Web and Scripting Module (sle-module-web-scripting/15/x86_64)
To activate the respective module or product, use SUSEConnect --product.
Use SUSEConnect --help for more details.
If you search for packages that are already installed or are available in one of the modules that are available on your system, the search results differ. In the following example, the package vim is already installed. The package emacs is not installed, but is available for installation without having to add a module.
>
zypper search-packages -x vim Following packages were found in following modules: Package Module or Repository ------- --------------------------------------------------- vim Basesystem Module (sle-module-basesystem/15/x86_64) vim Installed vim Available>
zypper search-packages -x emacs Following packages were found in following modules: Package Module or Repository ------- --------------------------------------------------- emacs Basesystem Module (sle-module-basesystem/15/x86_64) emacs Available
Instead of searching for packages, you can also view the list of packages that belong to a module or extension. Start the YaST
module and click › . Select an entry to display the list of packages that belong to this module or extension.4 Informacje prawne #
Copyright© 2006–2022 SUSE LLC i współautorzy. Wszelkie prawa zastrzeżone.
Kopiowanie, rozpowszechnianie i/lub modyfikowanie tego dokumentu jest dozwolone zgodnie z warunkami licencji GNU Free Documentation License w wersji 1.2 lub (zgodnie z wyborem użytkownika) w wersji 1.3, przy czym niniejsze informacje o prawach autorskich i licencji są sekcją niezmienną. Kopia licencji w wersji 1.2 znajduje się w sekcji zatytułowanej “GNU Free Documentation License”.
Znaki towarowe firmy SUSE, patrz http://www.suse.com/company/legal/. Wszystkie inne znaki towarowe są własnością odpowiednich firm. Symbole znaków towarowych (®, ™ itp.) oznaczają znaki towarowe firmy SUSE i jej podmiotów stowarzyszonych. Gwiazdki (*) oznaczają znaki towarowe osób trzecich.
Wszelkie informacje w niniejszym dokumencie zostały zebrane z najwyższą dbałością o szczegóły. Jednakże nie gwarantuje to pełnej dokładności. Firma SUSE LLC, jej podmioty stowarzyszone, autorzy ani tłumacze nie ponoszą odpowiedzialności za ewentualne błędy i ich konsekwencje.
5 GNU Free Documentation License #
Copyright (C) 2000, 2001, 2002 Free Software Foundation, Inc. 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. Everyone is permitted to copy and distribute verbatim copies of this license document, but changing it is not allowed.
0. PREAMBLE #
The purpose of this License is to make a manual, textbook, or other functional and useful document "free" in the sense of freedom: to assure everyone the effective freedom to copy and redistribute it, with or without modifying it, either commercially or non-commercially. Secondarily, this License preserves for the author and publisher a way to get credit for their work, while not being considered responsible for modifications made by others.
This License is a kind of "copyleft", which means that derivative works of the document must themselves be free in the same sense. It complements the GNU General Public License, which is a copyleft license designed for free software.
We have designed this License to use it for manuals for free software, because free software needs free documentation: a free program should come with manuals providing the same freedoms that the software does. But this License is not limited to software manuals; it can be used for any textual work, regardless of subject matter or whether it is published as a printed book. We recommend this License principally for works whose purpose is instruction or reference.
1. APPLICABILITY AND DEFINITIONS #
This License applies to any manual or other work, in any medium, that contains a notice placed by the copyright holder saying it can be distributed under the terms of this License. Such a notice grants a world-wide, royalty-free license, unlimited in duration, to use that work under the conditions stated herein. The "Document", below, refers to any such manual or work. Any member of the public is a licensee, and is addressed as "you". You accept the license if you copy, modify or distribute the work in a way requiring permission under copyright law.
A "Modified Version" of the Document means any work containing the Document or a portion of it, either copied verbatim, or with modifications and/or translated into another language.
A "Secondary Section" is a named appendix or a front-matter section of the Document that deals exclusively with the relationship of the publishers or authors of the Document to the Document's overall subject (or to related matters) and contains nothing that could fall directly within that overall subject. (Thus, if the Document is in part a textbook of mathematics, a Secondary Section may not explain any mathematics.) The relationship could be a matter of historical connection with the subject or with related matters, or of legal, commercial, philosophical, ethical or political position regarding them.
The "Invariant Sections" are certain Secondary Sections whose titles are designated, as being those of Invariant Sections, in the notice that says that the Document is released under this License. If a section does not fit the above definition of Secondary then it is not allowed to be designated as Invariant. The Document may contain zero Invariant Sections. If the Document does not identify any Invariant Sections then there are none.
The "Cover Texts" are certain short passages of text that are listed, as Front-Cover Texts or Back-Cover Texts, in the notice that says that the Document is released under this License. A Front-Cover Text may be at most 5 words, and a Back-Cover Text may be at most 25 words.
A "Transparent" copy of the Document means a machine-readable copy, represented in a format whose specification is available to the general public, that is suitable for revising the document straightforwardly with generic text editors or (for images composed of pixels) generic paint programs or (for drawings) some widely available drawing editor, and that is suitable for input to text formatters or for automatic translation to a variety of formats suitable for input to text formatters. A copy made in an otherwise Transparent file format whose markup, or absence of markup, has been arranged to thwart or discourage subsequent modification by readers is not Transparent. An image format is not Transparent if used for any substantial amount of text. A copy that is not "Transparent" is called "Opaque".
Examples of suitable formats for Transparent copies include plain ASCII without markup, Texinfo input format, LaTeX input format, SGML or XML using a publicly available DTD, and standard-conforming simple HTML, PostScript or PDF designed for human modification. Examples of transparent image formats include PNG, XCF and JPG. Opaque formats include proprietary formats that can be read and edited only by proprietary word processors, SGML or XML for which the DTD and/or processing tools are not generally available, and the machine-generated HTML, PostScript or PDF produced by some word processors for output purposes only.
The "Title Page" means, for a printed book, the title page itself, plus such following pages as are needed to hold, legibly, the material this License requires to appear in the title page. For works in formats which do not have any title page as such, "Title Page" means the text near the most prominent appearance of the work's title, preceding the beginning of the body of the text.
A section "Entitled XYZ" means a named subunit of the Document whose title either is precisely XYZ or contains XYZ in parentheses following text that translates XYZ in another language. (Here XYZ stands for a specific section name mentioned below, such as "Acknowledgements", "Dedications", "Endorsements", or "History".) To "Preserve the Title" of such a section when you modify the Document means that it remains a section "Entitled XYZ" according to this definition.
The Document may include Warranty Disclaimers next to the notice which states that this License applies to the Document. These Warranty Disclaimers are considered to be included by reference in this License, but only as regards disclaiming warranties: any other implication that these Warranty Disclaimers may have is void and has no effect on the meaning of this License.
2. VERBATIM COPYING #
You may copy and distribute the Document in any medium, either commercially or non-commercially, provided that this License, the copyright notices, and the license notice saying this License applies to the Document are reproduced in all copies, and that you add no other conditions whatsoever to those of this License. You may not use technical measures to obstruct or control the reading or further copying of the copies you make or distribute. However, you may accept compensation in exchange for copies. If you distribute a large enough number of copies you must also follow the conditions in section 3.
You may also lend copies, under the same conditions stated above, and you may publicly display copies.
3. COPYING IN QUANTITY #
If you publish printed copies (or copies in media that commonly have printed covers) of the Document, numbering more than 100, and the Document's license notice requires Cover Texts, you must enclose the copies in covers that carry, clearly and legibly, all these Cover Texts: Front-Cover Texts on the front cover, and Back-Cover Texts on the back cover. Both covers must also clearly and legibly identify you as the publisher of these copies. The front cover must present the full title with all words of the title equally prominent and visible. You may add other material on the covers in addition. Copying with changes limited to the covers, as long as they preserve the title of the Document and satisfy these conditions, can be treated as verbatim copying in other respects.
If the required texts for either cover are too voluminous to fit legibly, you should put the first ones listed (as many as fit reasonably) on the actual cover, and continue the rest onto adjacent pages.
If you publish or distribute Opaque copies of the Document numbering more than 100, you must either include a machine-readable Transparent copy along with each Opaque copy, or state in or with each Opaque copy a computer-network location from which the general network-using public has access to download using public-standard network protocols a complete Transparent copy of the Document, free of added material. If you use the latter option, you must take reasonably prudent steps, when you begin distribution of Opaque copies in quantity, to ensure that this Transparent copy will remain thus accessible at the stated location until at least one year after the last time you distribute an Opaque copy (directly or through your agents or retailers) of that edition to the public.
It is requested, but not required, that you contact the authors of the Document well before redistributing any large number of copies, to give them a chance to provide you with an updated version of the Document.
4. MODIFICATIONS #
You may copy and distribute a Modified Version of the Document under the conditions of sections 2 and 3 above, provided that you release the Modified Version under precisely this License, with the Modified Version filling the role of the Document, thus licensing distribution and modification of the Modified Version to whoever possesses a copy of it. In addition, you must do these things in the Modified Version:
Use in the Title Page (and on the covers, if any) a title distinct from that of the Document, and from those of previous versions (which should, if there were any, be listed in the History section of the Document). You may use the same title as a previous version if the original publisher of that version gives permission.
List on the Title Page, as authors, one or more persons or entities responsible for authorship of the modifications in the Modified Version, together with at least five of the principal authors of the Document (all of its principal authors, if it has fewer than five), unless they release you from this requirement.
State on the Title page the name of the publisher of the Modified Version, as the publisher.
Preserve all the copyright notices of the Document.
Add an appropriate copyright notice for your modifications adjacent to the other copyright notices.
Include, immediately after the copyright notices, a license notice giving the public permission to use the Modified Version under the terms of this License, in the form shown in the Addendum below.
Preserve in that license notice the full lists of Invariant Sections and required Cover Texts given in the Document's license notice.
Include an unaltered copy of this License.
Preserve the section Entitled "History", Preserve its Title, and add to it an item stating at least the title, year, new authors, and publisher of the Modified Version as given on the Title Page. If there is no section Entitled "History" in the Document, create one stating the title, year, authors, and publisher of the Document as given on its Title Page, then add an item describing the Modified Version as stated in the previous sentence.
Preserve the network location, if any, given in the Document for public access to a Transparent copy of the Document, and likewise the network locations given in the Document for previous versions it was based on. These may be placed in the "History" section. You may omit a network location for a work that was published at least four years before the Document itself, or if the original publisher of the version it refers to gives permission.
For any section Entitled "Acknowledgements" or "Dedications", Preserve the Title of the section, and preserve in the section all the substance and tone of each of the contributor acknowledgements and/or dedications given therein.
Preserve all the Invariant Sections of the Document, unaltered in their text and in their titles. Section numbers or the equivalent are not considered part of the section titles.
Delete any section Entitled "Endorsements". Such a section may not be included in the Modified Version.
Do not retitle any existing section to be Entitled "Endorsements" or to conflict in title with any Invariant Section.
Preserve any Warranty Disclaimers.
If the Modified Version includes new front-matter sections or appendices that qualify as Secondary Sections and contain no material copied from the Document, you may at your option designate some or all of these sections as invariant. To do this, add their titles to the list of Invariant Sections in the Modified Version's license notice. These titles must be distinct from any other section titles.
You may add a section Entitled "Endorsements", provided it contains nothing but endorsements of your Modified Version by various parties--for example, statements of peer review or that the text has been approved by an organization as the authoritative definition of a standard.
You may add a passage of up to five words as a Front-Cover Text, and a passage of up to 25 words as a Back-Cover Text, to the end of the list of Cover Texts in the Modified Version. Only one passage of Front-Cover Text and one of Back-Cover Text may be added by (or through arrangements made by) any one entity. If the Document already includes a cover text for the same cover, previously added by you or by arrangement made by the same entity you are acting on behalf of, you may not add another; but you may replace the old one, on explicit permission from the previous publisher that added the old one.
The author(s) and publisher(s) of the Document do not by this License give permission to use their names for publicity for or to assert or imply endorsement of any Modified Version.
5. COMBINING DOCUMENTS #
You may combine the Document with other documents released under this License, under the terms defined in section 4 above for modified versions, provided that you include in the combination all of the Invariant Sections of all of the original documents, unmodified, and list them all as Invariant Sections of your combined work in its license notice, and that you preserve all their Warranty Disclaimers.
The combined work need only contain one copy of this License, and multiple identical Invariant Sections may be replaced with a single copy. If there are multiple Invariant Sections with the same name but different contents, make the title of each such section unique by adding at the end of it, in parentheses, the name of the original author or publisher of that section if known, or else a unique number. Make the same adjustment to the section titles in the list of Invariant Sections in the license notice of the combined work.
In the combination, you must combine any sections Entitled "History" in the various original documents, forming one section Entitled "History"; likewise combine any sections Entitled "Acknowledgements", and any sections Entitled "Dedications". You must delete all sections Entitled "Endorsements".
6. COLLECTIONS OF DOCUMENTS #
You may make a collection consisting of the Document and other documents released under this License, and replace the individual copies of this License in the various documents with a single copy that is included in the collection, provided that you follow the rules of this License for verbatim copying of each of the documents in all other respects.
You may extract a single document from such a collection, and distribute it individually under this License, provided you insert a copy of this License into the extracted document, and follow this License in all other respects regarding verbatim copying of that document.
7. AGGREGATION WITH INDEPENDENT WORKS #
A compilation of the Document or its derivatives with other separate and independent documents or works, in or on a volume of a storage or distribution medium, is called an "aggregate" if the copyright resulting from the compilation is not used to limit the legal rights of the compilation's users beyond what the individual works permit. When the Document is included in an aggregate, this License does not apply to the other works in the aggregate which are not themselves derivative works of the Document.
If the Cover Text requirement of section 3 is applicable to these copies of the Document, then if the Document is less than one half of the entire aggregate, the Document's Cover Texts may be placed on covers that bracket the Document within the aggregate, or the electronic equivalent of covers if the Document is in electronic form. Otherwise they must appear on printed covers that bracket the whole aggregate.
8. TRANSLATION #
Translation is considered a kind of modification, so you may distribute translations of the Document under the terms of section 4. Replacing Invariant Sections with translations requires special permission from their copyright holders, but you may include translations of some or all Invariant Sections in addition to the original versions of these Invariant Sections. You may include a translation of this License, and all the license notices in the Document, and any Warranty Disclaimers, provided that you also include the original English version of this License and the original versions of those notices and disclaimers. In case of a disagreement between the translation and the original version of this License or a notice or disclaimer, the original version will prevail.
If a section in the Document is Entitled "Acknowledgements", "Dedications", or "History", the requirement (section 4) to Preserve its Title (section 1) will typically require changing the actual title.
9. TERMINATION #
You may not copy, modify, sublicense, or distribute the Document except as expressly provided for under this License. Any other attempt to copy, modify, sublicense or distribute the Document is void, and will automatically terminate your rights under this License. However, parties who have received copies, or rights, from you under this License will not have their licenses terminated so long as such parties remain in full compliance.
10. FUTURE REVISIONS OF THIS LICENSE #
The Free Software Foundation may publish new, revised versions of the GNU Free Documentation License from time to time. Such new versions will be similar in spirit to the present version, but may differ in detail to address new problems or concerns. See http://www.gnu.org/copyleft/.
Each version of the License is given a distinguishing version number. If the Document specifies that a particular numbered version of this License "or any later version" applies to it, you have the option of following the terms and conditions either of that specified version or of any later version that has been published (not as a draft) by the Free Software Foundation. If the Document does not specify a version number of this License, you may choose any version ever published (not as a draft) by the Free Software Foundation.
ADDENDUM: How to use this License for your documents #
Copyright (c) YEAR YOUR NAME. Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the section entitled “GNU Free Documentation License”.
If you have Invariant Sections, Front-Cover Texts and Back-Cover Texts, replace the “with...Texts.” line with this:
with the Invariant Sections being LIST THEIR TITLES, with the Front-Cover Texts being LIST, and with the Back-Cover Texts being LIST.
If you have Invariant Sections without Cover Texts, or some other combination of the three, merge those two alternatives to suit the situation.
If your document contains nontrivial examples of program code, we recommend releasing these examples in parallel under your choice of free software license, such as the GNU General Public License, to permit their use in free software.