Linux Essentials - The Linux Essentials Professional Development Certificate (PDC) is a great way to show employers that you have the foundational skills required for your next job or promotion. It also serves as an ideal stepping-stone to the more advanced LPIC Professional Certification track for Linux Systems Administrators.
LPIC-1: Linux Server Professional Certification - LPIC-1 is the first certification in LPI’s multi-level Linux Professional certification program. The LPIC-1 will validate your ability to perform maintenance tasks with the command line, install & configure a computer running Linux and be able to configure basic networking.
LPIC-2: Linux Network Professional Certification - LPIC-2 is the second certification in LPI’s multi-level professional certification program. The LPIC-2 will validate your ability to administer small to medium–sized mixed networks. You must have an active LPIC-1 certification to receive LPIC-2 certification, but the LPIC-1 and LPIC-2 exams may be taken in any order.
Red Hat Certification
Red Hat Certified System Administrator - An IT professional who has earned the Red Hat Certified System Administrator RHCSA is able to perform the core system administration skills required in Red Hat Enterprise Linux environments. The credential is earned after successfully passing the Red Hat Certified System Administrator (RHCSA) Exam (EX200).
Red Hat Certified Engineer (RHCE) - A Red Hat Certified Engineer RHCE is a Red Hat Certified System Administrator (RHCSA) who possesses the additional skills, knowledge, and abilities required of a senior system administrator responsible for Red Hat Enterprise Linux systems.
Red Hat Certified Architect (RHCA) - Red Hat Certified Architects RHCA prove their skills using Red Hat Enterprise Linux and other Red Hat technologies within existing architectures or when moving to new ones. A Red Hat Certified Architect (RHCA) is a Red Hat Certified Engineer (RHCE) who attained Red Hat's highest level of certification.