- Red Hat - This Raleigh, NC company has taken open source Linux and created a company that does complete enterprise support
- Fedora- The opensource and free version of Red Hat.
- SUSE- Another linux distribution that offers enterprise level solutions.
- OpenSUSE- The opensource and free version of SUSE.
- Raspberry Pi- a single board compter that runs various "flavors" of Linux and even Windows, A complete system can be purchased for under $100.00.
- Lynda.com- A site that offers video learning. Check out the difference service levels.
- Linux Academy- A site for linux education offering video coursework, quizzes, learning paths, and virtual servers to give you real practice for certifications.
- CompTIA- An IT professional organization that also offer certification training and testing.
- Linux Profesional Institute (LPI)- A Linux organization that also offers Linux certification.