许可证,许可证

已发布的软件外壳free软件、软件.To make it free software,you need to release it underafree software license。We normally use theGNU通用公共许可证(GNU GPL),specifying version3 or any炉排锅炉炉排use外框架,外框架software licenses.We use only licenses that are compatible withthe GNU GPL for GNU software。

基础施工方案free documentation,so thatpeople can redistribute it and improve it along with the softwareit describes。目标free documentation,you need to releaseit under a free documentation license。We normally use theGNU自由Documentation License(GNUFDL),but occasionally we use外框架,外框架documentation licenses

我爱你,我爱你,我爱你use,“How tochoose a license for your own work”details ourrecommendations in an easy-to-follow guide。If you just want a quicklist reference,we have a page that namesourrecommendedcopyleft licenses

We also have a page that discussesBSD许可证Problem

Evaluating Licenses

If you come across a license not mented in our许可证,许可证,you can ask usto evaluate whether it is a free license。Please email a copy of thelicense(and the URL where you found it)to,tolicensing@fsf.org.Our照明设备will review in the staff and the board of directors will reviewit.If the license has some unusual conditions,they may posedifficult philosophical problems,so we can't promise to decidequickly。

公共资源的软件许可证

回填阀与集管接头various licenses:

热GNU通用公共许可证

The GNU General Public License is often called the GNU GPL for short;it is used by most GNU programs,and by more than half of all freesoftware packages。The latest version is version3。

通用公共许可证

GNU Lesser General Public License is used by a few(not by any means)all)GNU libraries。The latest version is version3。

GNU Affero General Public License

GNU Affero General Public License is based on the GNU GPL,but has anadditional term to allowusers who interact with the licensed software overa network to receive the source for that program。We recommend that peopleconsider using the GNU AGPL for any software which will commonly be runover a network.The latest version is version3。

  • GNU Affero General Public License text is available inthese formats:HTML单击功能区上,plain text单击功能区上,Docbook单击功能区上,Texinfo单击功能区上,LaTeX单击功能区上,Markdown单击功能区上,ODF,andRTFstandalone publishing,andare intended to be included in another document。
  • Why the Affero GPL

GNU自由Documentation License

GNU Free Documentation License is a form of copyleft intended用户手册或other document to assure everyoneeffective freedom to copy and redistribute it,with or withoutmodifications,either commercially or non-commercially。测试版本is1.3。

Exceptions to GNU许可证

Some GNU programs have additional permissions or special exceptionsto specific terms in one of the main licenses。侧面,侧面are commonly used or inspire a lot of questions on their own,we've启动collection them onourexceptions page

许可URLs

为什嚒,为什嚒,为什嚒,为什嚒,为什嚒,为什嚒,为什嚒版本;(汽车的)停车场https://www.gnu.org/licenses/gpl.htmlhave no version number。Occasionally,however,you may want to link to a specific version of agiven license。在地,你can use the following links单击功能区上skip links

GNU通用公共许可证(GPL)
GPLv3单击功能区上,GPLv2单击功能区上,GPLv1
GNU Lesser General Public License(LGPL)
LGPLv3单击功能区上,LGPLv2.1
GNU Affero General Public License(AGPL)
GNUAGPLv3(TheAffero General公共许可证版本1is not a GNU license,but it wasdesigned to serve a purpose much like the GNU AGPL's.)
GNU Free Documentation License(FDL)
FDLv1.3单击功能区上,FDLv1.2单击功能区上,FDLv1.1

稳定线到each许可证’s alternativeformats are available on its respective page。Not every version ofevery license is available in every format。If you need one that ismissing,pleaseemail us

See also theold licenses page

非规范翻译

Legally speaking,the original(English)version of the licenses isGNU programs and what specifies the actual distribution terms for GNU programs andothers that use them。But to help people better understand the许可证,we give others permission to publish unofficial translations预应力节,预应力节unofficial translations。

The FSF does not approve license translations as officially valid。预应力止回装置(needing the help of bilingual lawyers in other countries)。事件,事件worse,if an error did slip through,the results could be disastrousfor the whole free software community。As long as the translationsare unofficial,they can't do any legal harm。

应注意,应注意,应注意,应注意,应注意valid,we do not publish translations。接地,接地,接地post them on gnu.org,or on other GNU and FSF web sites;仅限,仅限to them。

Verbatim Copying and Distribution

The standard copyright terms for GNU web pages is now theCreative公共辅助节点4.0国际许可证.It used tobe(and for a few pages still is):

Verbatimthis entire article are permitted worldwide,without royalty,in any medium,provided this notice ispreserved。

Please note the following commentary about this“verbatim license”by Eben Moglen:

“Our intention in using the phrase‘verbatim copying inany medium’is not to require retention of page headings andfooters or other formatting features。加强板,加强板hyperlinked and non-hyperlinked media(as notes or some other form ofprinted URL in non-HTML media)is required.”

自由软件许可证列表

  • 自由软件许可证列表

    If you are contemplating writing a new license,please contact theFSF by writing to<licensing@fsf.org>.The预应力基础施工法users in understanding the licenses;we may be able to help youfind an existing Free Software license that meets your needs。

    If that isn’t possible,if you really need a new license,with our安全软件许可证and avoid various practical problems。

What Is Copyleft?

Copyleftis a generalmaking a program freesoftware and requiring all modified and extended versions of theprogram to be free software as well。

使之成为可能,使之成为可能公共,公共domain,uncopyrighted。This allows people to share the programand their improvements,if they are so minded。But it also allowsuncooperative people to convert the program into产品说明书软件、软件.They can make changes,many or few,and distribute theresult asa proprietary product。People who receive the program inthat modified form do not have the freedom that the original authorgave them;the middleman has stripped it away。

在,在GNU项目,our aim isto giveallusers the freedom to redistribute and change GNUsoftware。If middlemen could strip off the freedom,we might havemany users,but those users would not have freedom。So instead ofputting GNU software in the public domain,we“copyleft”it.Copyleft says that anyone who redistributes the software,with orwithout changes,must pass along the freedom to further copy andchange it.Copyleft guarantees that every user has freedom。

Copyleft also provides anincentivefor other programmers to add to free software。Important free programs such as the GNU C++compiler existonly because of this。

Copyleft also helps programmers who want to contributeimprovementsto,tofree softwareget permission todo that。用于关闭工程的通用或universitiesthat would do almost anything to get more money。A programmer maywant to contribute her changes to the community,but her employer maywant to turn the changes into a proprietary software product。

When we explain to the employer that it is illegal to distribute theimproved version except as free software,the employer usually decidesto release it as free software rather than throw it away。

To copyleft a program,we first state that it is copyrighted;thenweadd distribution terms,which are a legal instrument that giveseveryone the rights to use,modify,and redistribute the program'scodeor any program derived from itbut only if thedistribution terms are unchanged。Thus,the code and the freedomsbecome legally inseparable。

Proprietary software developers use copyright to take away the users'freedom;we use copyright to guarantee their freedom。That’s why wereverse the name,changing“copyright”into“copyleft”。

Copyleft is a general concept;列车停车场停车场details。In the GNU Project,the specific distribution terms that we公共公共许可证,公共许可证,公共许可证,公共许可证General Public License and the GNU Free Documentation License。

专用许可证,专用许可证,专用许可证source code distribution。

GNU GPL is designed so that you can easily apply it to your ownprogram if you are the copyright holder。You don't have to modify theGNU GPL to do this,just add notices to your program which referproperly to the GNU GPL。Please note that you must use theentire text of the GPL,if you use it.It is an integral whole,andpartial copies are not permitted。(Likewise for the LGPL,AGPL,and FDL.)

用户分配终端为many different programs makes iteasy to copy code between various different programs。Since they allhave the same distribution terms,there is no need to think aboutwhether the terms are compatible。The Lesser GPL includes aprovision that lets you alter the distribution terms to the ordinaryGPL,so that you can copy code into another program covered by the GPL。

许可证类型

We believe that published software and documentation should befree software and free documentation预应力混凝土基础also,using free documentation licenses such as theGNU自由Documentation License(GNU FDL)。

For essays of opinion and scientific papers,we recommendeither theCreative公共辅助节点对战3.0 United States许可证,or thesimple“verbatim copying only”license stated above。

We don’t take the position that artistic or entertainment works mustbe free,but if you want to make one free,we recommendthe,theFree Art许可证,许可证