Red Hat Certified Architect RHCA:Red HatCertified Architect Red Hat Certified Architect (RHCA)[1] The Red Hat Enterprise Architect program provides in-depth, hands-on training primarily for senior Linux system administrators who are responsible for deploying and managing a multitude of systems in large enterprise environments. Red Hat Certified Architect is the latest top-level certification from Red Hat following the Red Hat Certified Technician (RHCSA) and Red Hat Certified Engineer (RHCE) certifications, and is recognized as the most popular and mature certification in the Linux field. Red Hat Certified Engineer (RHCE) is a test program based on practical operation ability, which mainly examines the candidates' actual ability in the live system. The Red Hat Certified Engineer (RHCE) certification demonstrates the skills that Linux system administrators should master. A Red Hat Certified Engineer should have the ability to configure network services and security in addition to all of the skills that a Red Hat Certified Technician has, and he/she should be able to decide which services should be deployed on a company's network and exactly how they should be deployed. This certification includes details on DNS, NFS, Samba, Sendmail, Postfix, Apache, and key security features.