To become Linux certified, one must choose The Linux Foundation certification and study the relevant domains and competencies for either the LFCS or LFCE exam. The Linux Foundation is a good choice because they created Linux and provide standard, distro-flexible training courses and exams that are available anytime, anywhere and keep content up to date. To prepare, one should find training through books, online courses, or instructors, practice hands-on, and register for the exam which costs $300 each. When taking the exam, arrive on time and be prepared to focus without distractions in order to pass the 74% threshold.