How do people learn about licenses? If you entered into software in a certain way, it's easy to assume that everyone is a part-time license attorney. But how do other people pick up license knowledge? And what does one really need to know? Licenses underpin open source but seem kind of dull. But they are also a cool and special thing about the software industry. Lars provides his licenses 101 thoughts and looks forward to becoming open source grandpa. Links GPL BSD license MIT license Apache license LGPL AGPL - Affero license OSI Open source licenses tried in court Source-available Cockroach BSL - business source license FOSDEM Oxide & friends on how they handle the CockroachDB thing Forking Terraform Opentofu Elasticsearch Opensearch Redis Valkey The Redis-Valkey-story The XZ backdoor Andres Freund - The Microsoftie who found the issue Visual studio code VSCodium Gitpod code-server Embrace, extend, extinguish Docker Podman Hashicorp Salt Ansible Terraform Stallman Compis Apple II MySQL CLA - contributor license agreement Kelsey Hightower VLC Winamp Slackware Debian Coding freedom - book by Gabriella Coleman (full PDF) FreeBSD Ideell förening Moomin dad Snufkin Pettson Jussi Björling Gramophone player