I am a certified database Administrator (Oracle), Certified Unix Administrator (Solaris) and a Certified Business Intelligence professional. Currently working as a system administrator in Banking. I have published several e-books among them Docker Baby steps available in Amazon. Other e-books include SpagoBI Baby Steps and Knowage Baby Steps. SpagoBI and Knowage are open source business intelligence tools available free of charge. Containers are the new virtual machines and every system administrator is highly encouraged to learn them. The e-books are available free of charge to my students.