While electricity usage is a relatively small portion of the 5-year TCO for the conditions assumed in this study. show that Linux-certified professionals earn 10-20% more than their Microsoft counterparts. The Red Hat India website claims. BEGINNER’S GUIDE FOR LINUX – Start Learning Linux in Minutes. by. Linux Foundation Certification Exam Study Guide to. Tecmint’s Guide to Red Hat. That study, published last week (PDF, 61 pages), concludes that Facebook’s…