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RHCE RH255 Certification


Red Hat System Administration III with RHCE Exam (RH255) is designed for experienced Linux administrators who require networking and security administration skills. With a heavy emphasis on practical hands on labs, this course is tightly aligned with experienced Linux administrators´ job tasks and the skills required for advancement. Focus is placed on enhancing the students´ automation skills to securely configure, deploy and manage network services including DNS, Apache, SMTP and network file sharing. In addition, this course emphasizes security including monitoring, packet filtering, access controls and SELinux. At the completion of this course, students already familiar with the RHCT/RHCSA administration skills will have exposure to all competencies tested by the RHCSA and RHCE exams. This class includes the RHCSA and the RHCE exams.


  1. Senior Linux system administrators who require networking and security administration skills
  2. Linux IT professionals who are currently RHCT/RHCSA, and are interested in earning an RHCE certification
  3. Linux IT professionals that can demonstrate the competencies needed to earn an RHCT/RHCSA, but have not passed the RHCSA exam provided with the Red Hat System Administration II course


  1. RHCSA Rapid Track Course or Red Hat System Administration I & II
  2. Equivalent experience to the RHCSA Rapid Track Course
  3. Skills required to earn an RHCT/RHCSA certification
  4. Confirmation of the correct skill-set required for this course can be obtained by passing the online pre-assessment quiz -pre-assessment questionnaire

Course Outline

The following is an outline of the skills and knowledge represented in the training elements of the Red Hat System Administration III with RHCE Exam (RH255) course.

Unit 1 – Getting Started with the Classroom Environment

Objective: Given a virtualized environment, begin to administrate multiple systems using prerequisite skills

Unit 2 – Enhance User Security

Objective: Configure system to use Kerberos to verify credentials and grant privileges via sudo

Unit 3 – Bash Scripting and Tools

Objective: Automate system administration tasks utilizing Bash scripts and text-based tools

Unit 4 – File Security with GnuPG

Objective: Secure files with GnuPG

Unit 5 – Software Management

Objective: Use yum plugins to manage packages and understand the design of packages to build a simple package

Unit 6 – Network Monitoring

Objective: Profile running services then capture and analyze network traffic

Unit 7 – Route Network Traffic

Objective: Configure system to route traffic and customize network parameters with sysctl

Unit 8 – Secure Network Traffic

Objective: Secure network traffic through SSH port forwarding and iptables filtering/network address translation (NAT)

Unit 9 – NTP Server Configuration

Objective: Configure an NTP server

Unit 10 – Filesystems and Logs

Objective: Manage local file system integrity, monitor system over time, and system logging

Unit 11 – Centralized and Secure Storage

Objective: Access centralized storage (iSCSI) and encrypt filesystems

Unit 12 – SSL-encapsulated Web Services

Objective: Understand SSL certificates and deploy an SSL encapsulated web service

Unit 13 – Web Server Additional Configuration

Objective: Configure web server with virtual hosts, dynamic content, and authenticated directories

Unit 14 – Basic SMTP Configuration

Objective: Configure an SMTP server for basic operation (null client, receiving mail, smarthost relay)

Unit 15 – Caching-Only DNS Server

Objective: Understand DNS resource records and configure a caching-only name server

Unit 16 – File Sharing with NFS

Objective: Configure file sharing between hosts with NFS

Unit 17 – File Sharing with CIFS

Objective: Configure file and print sharing between hosts with CIFS

Unit 18 – File Sharing with FTP

Objective: Configure file sharing with anonymous FTP

Unit 19 – Troubleshooting Boot Process

Objective: Understand the boot process and recover unbootable systems with rescue mode