User's Manual
126
When we speak of free software, we are referring to freedom, not
price.OurGeneralPublicLicensesaredesignedtomakesurethat
youhavethefreedomtodistributecopiesoffreesoftware(and
charge for this service if you wish), that you receive source code or
can get it if you want it, that you can change the software or use
pieces of it in new free programs; and that you know you can do
these things.
Toprotectyourrights,weneedtomakerestrictionsthatforbid
anyone to deny you these rights or to ask you to surrender the
rights.Theserestrictionstranslatetocertainresponsibilitiesfor
youifyoudistributecopiesofthesoftware,orifyoumodifyit.
Forexample,ifyoudistributecopiesofsuchaprogram,whether
gratis or for a fee, you must give the recipients all the rights that
you have. You must make sure that they, too, receive or can get
the source code. And you must show them these terms so they
know their rights.
We protect your rights with two steps: (1) copyright the software,
and (2) oer you this license which gives you legal permission to
copy,distributeand/ormodifythesoftware.
Also,foreachauthor’sprotectionandours,wewanttomake
certain that everyone understands that there is no warranty for
thisfreesoftware.Ifthesoftwareismodiedbysomeoneelseand
passed on, we want its recipients to know that what they have is
nottheoriginal,sothatanyproblemsintroducedbyotherswill
notreectontheoriginalauthors’reputations.