In 1983 a programmer at MIT decided that the entire commercial software industry had made a moral error, and set out to rebuild a complete operating system from scratch so that no one would ever have to accept it. He almost finished. The story of GNU is the story of the license, the manifesto, and the missing kernel that Linux walked in to fill.
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The Story of the GNU Project: The Operating System That Refused to Be Owned -
The Story of Linux How a Finnish student's 1991 hobby kernel, posted to a Usenet group with the caveat that it "won't be big and professional like gnu," collided with a free GNU userland, a frozen BSD lawsuit, and the GPL — and became the operating system of the cloud, the supercomputer, and three billion phones.
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Open-Source Licensing, Actually Explained What you can ship and what you must share: permissive versus copyleft mechanics, the linking question, why SaaS broke the GPL and created the AGPL, the relicensing wars of Elastic, Redis, MongoDB, and HashiCorp and the forks that answered them, source-available versus open source, CLAs versus DCOs, and a practical compliance checklist.