6Open Source Culture
- 6.1Open Source Concepts and Licenses
Learn the definition and traits of open source and its major licenses: the freedoms to use, modify, and redistribute published source code; that OSS remains a copyrighted work offered without warranty under continuous development; and the differences among copyleft licenses (GPL, AGPL, LGPL), permissive ones (BSD, MIT, Apache License), the middle-ground MPL, and the public domain.
- 6.2Open Source Communities and the Ecosystem
Learn how communities sustain open source development: communication venues (mailing lists, forums, development sites like GitHub), the structure of maintainers and contributors, and stepping into the ecosystem through use, advocacy, and bug reports.

