Linux Administration

Linux administration involves managing and maintaining Linux-based systems. This includes tasks such as installing and configuring the operating system, managing user accounts, ensuring system security, installing and updating software, and troubleshooting issues.

Certifications for Linux Administration:

1. RHCSA (Red Hat Certified System Administrator):

   • Offered by Red Hat, this certification focuses on the skills needed for day-to-day Linux system administration tasks.

   • It covers topics like file systems and storage, user and group administration, security, and basic system troubleshooting.

   • RHCSA is a great starting point for those entering the field of Linux administration.

   • For more information:-

     https://www.redhat.com/en/services/training/ex200-red-hat-certified-system-administrator-rhcsa-exam?section=objectives

2. LFCS (Linux Foundation Certified System Administrator):

   • This certification, provided by the Linux Foundation, is distribution-agnostic, meaning it covers general Linux skills applicable to various distributions.

   • It includes tasks related to system architecture, the command line, file systems and hierarchy, system startup processes, and more.

   • LFCS is suitable for those who want a broader understanding of Linux administration across different distributions.

   • For More Information:-

     https://training.linuxfoundation.org/certification/linux-foundation-certified-sysadmin-lfcs/

we recommend that everyone follow the RHCSA path to become a Linux administrator because it involves a lot of concepts and troubleshooting of servers.

RHCSA (Red Hat Certified System Administrator) Path:

1. Understand the Basics:

   • Familiarize yourself with Linux fundamentals, including the command line, file systems, and basic navigation.

2. User and Group Management:

   • Learn how to create, modify, and delete user accounts. Understand group administration and permissions.

3. File Systems and Storage:

   • Master tasks related to file systems, disk management, and storage configuration.

4. Networking:

   • Gain knowledge of basic networking concepts, configure network interfaces, and troubleshoot network issues.

5. Security:

   • Understand and implement security measures, including firewall configuration, user authentication, and file permissions.

6. System Administration:

   • Perform system administration tasks such as system boot processes, service management, and process monitoring.

7. Troubleshooting:

   • Develop troubleshooting skills to identify and resolve common system issues.

8. Automation:

   • Learn basic automation with shell scripting to streamline repetitive tasks.

[ https://www.redhat.com/en/services/training/ex200-red-hat-certified-system-administrator-rhcsa-exam?section=objectives ]

Differences Between RHEL 7, RHEL 8, and RHEL 9:

1. Systemd Adoption:

   • RHEL 7 used the init system, while RHEL 8 and RHEL 9 adopted systemd, a modern system and service manager.

2. Package Management:

   • RHEL 7 primarily used the YUM package manager, while RHEL 8 introduced the modular repository and the DNF package manager, providing better software management.

3. Web Console:

   • RHEL 8 introduced the web console, a browser-based interface for system management tasks. This feature continued in RHEL 9, making it easier to manage systems with a graphical interface.

4. AppStreams and Modules:

   • RHEL 8 introduced the concept of AppStreams and modules, allowing users to choose different versions of software components. RHEL 9 continues to build on this modular approach.

5. Kernel and Performance Improvements:

   • Each new release typically brings improvements in the Linux kernel, performance enhancements, and optimizations.

6. Security Enhancements:

   • With each release, there are updates to security features to address emerging threats and vulnerabilities.

7. Containerization:

   • RHEL 8 and RHEL 9 emphasize containerization technologies, with tools like Podman and Buildah.

8. Ansible Integration:

   • Ansible, an automation tool, is tightly integrated into RHEL 8 and RHEL 9, simplifying automation and configuration management.

For More Information:-

1. Rhel 7 and Rhel 8 differences:-

   https://www.simplylinuxfaq.com/p/major-differences-between-rhel-8-and-7.html

2. Rhel 8 and Rhel 9 differences:-

   https://www.simplylinuxfaq.com/p/rhel9-vs-8-differences.html