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What is Linux

What is Linux Operating System

Linux is based on the UNIX operating system. UNIX is a powerful, multi-user, multitasking operating system originally developed in the 1970s at AT&T Bell Labs. It laid the foundation for many modern operating systems, including Linux.

  • Linux is free and open-source, accessible to everyone.
  • Its source code can be inspected and modified by anyone.
  • This promotes global collaboration and innovation.
  • Linux offers efficient performance and strong security.
  • It works well across many devices and industries.

The Linux Operating System is a Unix-like operating system that combines a wide range of open-source tools and components to form a complete computing environment. These components include file systems, user interfaces, system utilities, and application programs all working together to manage hardware and enable users to interact with their computer systems.

Linus Benedict Torvalds, the creator of the Linux kernel and one of the most influential figures in computing history.

 

Who is Linus Benedict Torvalds?

DetailInformation
Full NameLinus Benedict Torvalds
Date of BirthDecember 28, 1969
Place of BirthHelsinki, Finland
NationalityFinnish-American
ProfessionSoftware Engineer
Known ForCreating the Linux kernel and Git
Current RoleMaintainer of the Linux kernel

Creation of Linux (1991)

 The Beginning:

  • In 1991, while still a student, Linus became frustrated with Minix (a teaching OS) and wanted a better alternative.

  • He started writing his own kernel (the core of an operating system).

 

Awards and Recognition

Award/RecognitionYear
Millennium Technology Prize2012
IEEE Computer Pioneer Award2014
TIME 100 Most Influential People2004
Internet Hall of Fame2012

Why Use Linux

Why use Linux?

Because it is free, open-source, and extremely flexible, Linux is widely utilized. For servers and developers, it is the ideal option because it offers strong security, stability, and performance. Generally interoperable hardware, a broad software library, and a vibrant community that offers support and regular updates are the many benefits of Linux. Due to its adaptability, users can customize the operating system according to their own needs, whether they become for personal or large enterprise use

 

1.  Free and Open Source

  • Linux is completely free to download and use.

  • The source code is open, so anyone can view, modify, or distribute it.

  • No license fees — great for personal and business use.

 

2.  Secure and Stable

  • Linux is very secure due to strong user permissions and open development.

  • Less vulnerable to viruses and malware than Windows.

  • Used on servers, firewalls, and security systems for this reason.

  • Can run for months or years without crashing — great for long-term use.

 

3.  Lightweight and Fast

  • Linux can run on older or low-spec hardware with no problem.

  • Many distributions (like Lubuntu, Xubuntu, Puppy Linux) are optimized for speed and low memory usage.

 

4. Widely Used in Servers and Cloud

  • Most web servers run Linux (Apache, Nginx, etc.).

  • Cloud platforms like AWS, Azure, Google Cloud use Linux VMs.

  • Essential if you want to work in DevOps, cloud computing, cybersecurity, or system administration.

Linux is the backbone of IT Infra. About 96% of the world’s top 1 million servers run on Linux and about 90% of all cloud infrastructure operates on Linux and practically all the best cloud hosts use it. Some of the main reasons of Linux becoming so popular are:

1. High Security (Virus Free)
2. High Stability
3. Ease of Maintenance
4. Hardware Independent
5. Freely Available
6. Distributed OS
7. Supports All File Systems
8. Multiuser, Multitasking OS
9. Open Source
10. Ease of Use
11. Customization
12. Education
13. Support
14. Community Support

Linux is Used in:
1. Super Computers
2. Servers, Cloud Computing
3. The Large Hadron Collider
4. NASA
5. Space Robots
6. Game Consoles
7. Smart TVs
8. US Defence
9. Nuclear Submarines
10. Space Station
11. Smart Watches
12. Automobiles
13. Flights
14 Air Traffic Control (ATC)
15. Stock Exchanges
16. Mobile Phones
17. Laptop, Desktops & PCs

Apart from this Linux also provides:
1. A Key Skill For IT
2. Great Career Opportunities
3. Higher Salaries
4. Key For System Administrators & Server Admins
5. Platform For Effective Programming
6. Privacy Protection & Security
7. Higher Stability
8. Endless Opportunities For Other IT Domains

Linux Flavors

What Are Linux Flavors?

Linux flavors are different versions of Linux, created by combining the Linux kernel with different tools, interfaces, and package managers. Each distro serves a specific purpose — from beginner use to advanced hacking.

1. Beginner-Friendly Linux Flavors

These distros are easy to install, use, and maintain — perfect for those new to Linux.

 Ubuntu

  • Based on: Debian

  • Why it’s good: Most popular, easy to install, huge community support.

  • User Interface: GNOME (modern, clean look)

  • Best for: Beginners, general users, students.

 

Professional & Server Flavors

Built for enterprise use, servers, and data centers — highly stable.

Debian

  • Parent of Ubuntu, known for stability.

  • Why it’s good: Very stable, rock-solid, trusted by developers.

  • Best for: Servers, system admins, devs.

 

 Ubuntu Server

  • Based on: Debian

  • Why it’s good: Easy to deploy, great for cloud/hosting.

  • Best for: Web servers, cloud services.

 

 Red Hat Enterprise Linux (RHEL)

  • Commercial distro

  • Why it’s good: Enterprise-level support, certified for business use.

  • Best for: Corporate environments.

 

 CentOS Stream

  • Based on: RHEL

  • Why it’s good: RHEL-compatible, free version for developers.

  • Best for: Testing apps for enterprise environments.

 

Rocky Linux / AlmaLinux

  • Forks of CentOS (after Red Hat changed CentOS focus)

  • Why it’s good: Free RHEL alternatives with long-term support.

  • Best for: Enterprises looking for RHEL compatibility without cost.

 

Hacking / Security Flavors

Used for ethical hacking, penetration testing, and digital forensics.

Kali Linux

  • Based on: Debian

  • Why it’s good: Comes with 600+ security tools.

  • Best for: Hackers, security professionals, cybersecurity students

 Parrot OS

  • Based on: Debian

  • Why it’s good: Lighter than Kali, also includes anonymity and programming tools.

  • Best for: Ethical hacking, privacy.

 

BackBox

  • Based on: Ubuntu

  • Why it’s good: Lighter, more user-friendly than Kali.

  • Best for: Lightweight penetration testing.

Linux Flavors Summary Table

CategoryDistros
BeginnerUbuntu, Linux Mint, Zorin OS, Elementary OS
LightweightLubuntu, Xubuntu, Puppy Linux
ServersDebian, Ubuntu Server, CentOS, Rocky Linux
DevelopersFedora, Pop!_OS, openSUSE
AdvancedArch, Manjaro, Gentoo
HackingKali Linux, Parrot OS, BackBox
Education/PrivacyEdubuntu, Tails, Qubes OS

Why Use Linux

Where Linux is deployed Use

Where Is Linux Deployed?

Linux is everywhere — from smartphones to supercomputers. Here’s a breakdown:

1.  Servers (Web, Database, File Servers)

  • Most websites run on Linux servers (Apache, Nginx, etc.)

  • Used by companies like:

    • Google

    • Facebook

    • Amazon

    • Netflix

  • Common distros:

    • Ubuntu Server

    • Debian

    • CentOS / Rocky / AlmaLinux

    • Red Hat Enterprise Linux (RHEL)

 Why?

  • Stability, security, and cost-effectiveness.

 

2.  Cloud Computing / Virtual Machines

  • Linux is the backbone of major cloud platforms:

    • Amazon Web Services (AWS)

    • Google Cloud Platform (GCP)

    • Microsoft Azure

  • Linux is the default OS for most virtual machines.

Tools like:

  • Docker

  • Kubernetes

  • Terraform

are all built around Linux.

 

3.  Mobile Devices (Android)

  • Android is based on the Linux kernel.

  • Every Android phone or tablet is running a version of Linux.

 So, over 3 billion+ devices run Linux thanks to Android.

4. Embedded Systems (IoT, Cars, Smart Devices)

  • Linux is used in:

    • Smart TVs

    • Routers

    • Washing machines

    • Smart cars (even Tesla OS)

    • Raspberry Pi projects

    • ATMs and kiosks

 Why?

  • Lightweight, customizable, and free to use.

 

5.  Cybersecurity and Penetration Testing

  • Security professionals use Linux for:

    • Network scanning

    • Ethical hacking

    • Digital forensics

  • Popular distros:

    • Kali Linux

    • Parrot OS

 

Summary: Where Linux Is Deployed

AreaExamples / Use Cases
ServersWeb hosting, databases, internal tools
Cloud ComputingAWS, Azure, GCP VMs
Mobile DevicesAndroid phones and tablets
SupercomputersScientific simulations, AI, modeling
Desktops/LaptopsProgramming, learning, office use
Embedded Systems / IoTSmart TVs, cars, routers, Raspberry Pi
CybersecurityPen testing, network forensics
Education/ResearchLabs, coding courses, academic computing

Architecture of Linux

  1. Kernel: Kernel is the core of the Linux based operating system. It virtualizes the common hardware resources of the computer to provide each process with its virtual resources. This makes the process seem as if it is the sole process running on the machine. The kernel is also responsible for preventing and mitigating conflicts between different processes. Different types of the kernel are:
    • Monolithic Kernel
    • Hybrid kernels
    • Exo kernels
    • Micro kernels
  1. System Library: Linux uses system libraries, also known as shared libraries, to implement various functionalities of the operating system. These libraries contain pre-written code that applications can use to perform specific tasks. By using these libraries, developers can save time and effort, as they don’t need to write the same code repeatedly. System libraries act as an interface between applications and the kernel, providing a standardized and efficient way for applications to interact with the underlying system.
  1. Shell: The shell is the user interface of the Linux Operating System. It allows users to interact with the system by entering commands, which the shell interprets and executes. The shell serves as a bridge between the user and the kernel, forwarding the user’s requests to the kernel for processing. It provides a convenient way for users to perform various tasks, such as running programs, managing files, and configuring the system.
  1. Hardware Layer: The hardware layer encompasses all the physical components of the computer, such as RAM (Random Access Memory),HDD (Hard Disk Drive), CPU (Central Processing Unit), and input/output devices. This layer is responsible for interacting with the Linux Operating System and providing the necessary resources for the system and applications to function properly. The Linux kernel and system libraries enable communication and control over these hardware components, ensuring that they work harmoniously together.
  1. System Utility: System utilities are essential tools and programs provided by the Linux Operating System to manage and configure various aspects of the system. These utilities perform tasks such as installing software, configuring network settings, monitoring system performance, managing users and permissions, and much more. System utilities simplify system administration tasks, making it easier for users to maintain their Linux systems efficiently.

What Does the Linux Kernel Do?

FunctionDescription
🔄 Process ManagementStarts, stops, and manages running programs (apps).
🧠 Memory ManagementAllocates RAM to apps and manages virtual memory (swap).
📁 File System ManagementReads, writes, and organizes files on your disk.
🖥️ Device ManagementCommunicates with devices via drivers (keyboard, mouse, printer, etc.).
🌐 NetworkingManages internet connections (TCP/IP, routing, firewalls).
🔒 Security & AccessControls which users/programs can access what.

[RHCSA + RHCE] RedHat Linux Certification Course

What is the Red Hat Linux program?

The Red Hat Linux training is the world’s number one Linux training. It consists of Red Hat’s two most popular courses: the RHCSA course and the RHCE course. These two courses make you proficient in working with the Red Hat Enterprise Linux environments.

The Red Hat Certified System Administrator (RHCSA) certification proves your skills in carrying out the core system administration tasks needed in the Red Hat Enterprise Linux workplace. It builds your foundation for system administration across all Red Hat products.

The Red Hat Certified Engineer (RHCE) course trains you with all the necessary skills to automate Red Hat Enterprise Linux tasks, work with Red Hat emerging technologies, and learn automation for new ideas.

Therefore, the RHCSA and RHCE courses are the stepping stones to beginning a career in the Linux industry. If you aspire to become a Linux Administrator, enroll in the Red Hat Linux course and start your learning journey!

 

Why choose the Red Hat training for Linux?

There are many different vendors available for Linux. However, Red Hat Linux is the most popular of them all. Over 90% of Fortune 500 companies rely on Red Hat Linux for running their Operating Systems (OS).

It is best to go for Red Hat Linux training to earn better salary packages, as most business organizations depend on Red Hat Linux to keep their systems up.

You can enroll for the Red Hat Linux course at Network Kings, a certified educational partner with Red Hat!

 

What is the scope of RHCSA and RHCE certification?

RHCSA & RHCE certifications help you excel in the tech industry as a Linux Administrator. You can even work as a Linux Engineer after taking the RHCE training.

You can earn a handsome salary package after the Red Hat Linux course. The need for Linux experts is increasing in IT, establishing the demand for Linux engineers, and OS has become one of the favourites of the techies.

What is RHCSA Certification?

The RHCSA (Red Hat Certified System Administrator) certification is an entry-level credential offered by Red Hat that validates a candidate’s ability to perform core system administration tasks. These include installation, configuration, network services, managing users and groups, and basic security administration on Red Hat Enterprise Linux systems.

Whether you’re a beginner or transitioning into Linux-based IT infrastructure, the RHCSA is your first step to becoming a Red Hat Certified Engineer (RHCE) or even a Red Hat Certified Architect (RHCA) in the futu

 

RHCSA Certification Course Syllabus 

Here’s a breakdown of what you’ll learn in a full RHCSA course:

ModuleTopics Covered
Module 1Introduction to Red Hat Enterprise Linux
Module 2Installing RHEL using graphical and text mode
Module 3Managing users, groups, passwords
Module 4File system structure, permissions, and ownership
Module 5Managing partitions, LVM, swap
Module 6Boot process and GRUB2 configuration
Module 7Yum/DNF package management
Module 8Systemd, services, and runlevels
Module 9Networking configuration and firewall settings
Module 10Shell scripting basics and job automation
Module 11SELinux management and system security
Module 12RHCSA Exam Preparation with Live Scenarios

RHCSA Certification Exam Details

FeatureDetails
Exam CodeEX200
Duration2.5 Hours
Exam FormatHands-on Practical
Passing Score210/300 (70%)
ModeRemote and In-Person

Career Opportunities After RHCSA

With RHCSA in your toolkit, you can apply for roles such as:

  • Linux System Administrator

  • Cloud Support Engineer

  • Technical Support Engineer

  • DevOps Engineer (Linux-based environments)

  • Data Center Administrator

 

RHCE:

The RHCE certification is for candidates who want to prove their skills as a Red Hat Certified Engineer and want to focus on system administration, networking, security, storage management, and automation. 

There are three exams for RHCE that specify different versions of the Red Hat Linux. These are as follows:

  1. EX294: This exam is based on Red Hat Enterprise Linux 8 (RHEL 8). This exam covers topics such as security, storage management, networking, system administration, and automation using Ansible.

Exam Name

Red Hat Certified Engineer (RHCE)

Exam Code

EX294

Exam Cost

USD 400

Exam Format

Performance-based questions

Total Questions

15-20 questions

Passing Score

210/300

Exam Duration

4 hours

Languages

English, Japanese, Korean, and Simplified Chinese

Testing Center

Pearson VUE

Common Server Use Cases and Applications of Linux Server

Linux servers are widely used in various domains and applications, including:

  1. Web Hosting: Linux servers are widely used for web hosting services. They support popular web server software like Apache, Nginx, and LiteSpeed, making them ideal for hosting websites, blogs, e-commerce platforms, and content management systems (CMS) such as WordPress, Drupal, and Joomla.
  2. Database Management: Linux servers are well-suited for database management tasks. They can host and manage databases using software like MySQL, MariaDB, PostgreSQL, MongoDB, and Redis. Linux’s stability, performance, and security features make it a preferred choice for database servers in enterprise environments.
  3. Application Hosting: Linux servers host a wide range of applications and services, including business applications, collaboration tools, messaging platforms, and productivity suites. Examples include ERP systems, CRM software, email servers (e.g., Postfix, Sendmail), file-sharing services (e.g., Nextcloud), and office suites (e.g., LibreOffice).
  4. Cloud Computing: Linux is a foundational technology in cloud computing environments. It powers many cloud platforms, including public clouds (e.g., AWS, Google Cloud Platform, Microsoft Azure), private clouds, and hybrid clouds. Linux-based virtual machines (VMs) and containers play a crucial role in cloud infrastructure and application deployment.
  5. DevOps and Continuous Integration/Continuous Deployment (CI/CD): Linux servers are integral to DevOps practices and CI/CD pipelines. They host tools like Jenkins, GitLab CI/CD, Travis CI, and Ansible for automating build, test, and deployment processes. Linux containers (e.g., Docker) and orchestration platforms (e.g., Kubernetes) further streamline DevOps workflows.
  6. Networking and Security: Linux servers are used as networking appliances, routers, firewalls, and security gateways. They run networking software such as iptables, OpenVPN, IPsec, and Snort for network security, monitoring, and traffic management. Linux-based network-attached storage (NAS) devices are also popular for file storage and sharing.
  7. Virtualization and Containerization: Linux serves as a foundation for virtualization technologies, allowing organizations to create virtual machines (VMs) using platforms like KVM, Xen, and VMware. Linux containers, powered by Docker, Podman, and LXC/LXD, provide lightweight and scalable application deployment environments.
  8. Data Analysis and Big Data: Linux servers support data analysis and big data processing frameworks like Hadoop, Spark, Elasticsearch, and Apache Kafka. They handle large-scale data processing, analytics, and real-time data streaming for businesses and research institutions.
  9. Educational and Development Environments: Linux servers are used in educational institutions, development labs, and training environments. They provide a platform for learning Linux administration, programming, scripting, and server management skills. Tools like Vagrant and Docker make it easy to set up development environments on Linux servers.
  10. IoT (Internet of Things) and Embedded Systems: Linux is prevalent in IoT and embedded systems due to its lightweight nature and broad hardware support. It powers IoT gateways, smart devices, industrial automation systems, and embedded applications in sectors like smart cities, healthcare, automotive, and home automation.

1. Web Servers

  • Description: Web servers host websites, manage HTTP requests, and deliver web content to users.
  • Popular Software:
    • Apache HTTP Server: One of the most widely used web servers.
    • Nginx: A lightweight, high-performance web server often used as a reverse proxy.
    • LiteSpeed: An alternative high-performance web server.
  • Common Use: Hosting websites, blogs, web applications, and content management systems (CMS) like WordPress.

 

Why Linux?

  • Linux offers a robust environment with extensive security features (SELinux, AppArmor), and it is highly customizable, making it ideal for managing high-traffic web servers.

 

2. Database Servers

  • Description: Database servers manage and store data for applications, websites, and other services.
  • Popular Database Software:
    • MySQL / MariaDB: Popular relational database management systems (RDBMS).
    • PostgreSQL: A powerful, open-source relational database system with advanced features.
    • MongoDB: A NoSQL database often used in big data and real-time applications.
  • Common Use: Storing and managing data for websites, applications, enterprise systems, and analytics.

 

Why Linux?

  • Linux provides a stable and secure environment for databases with robust performance under load, offering high availability, scalability, and support for a wide range of database software.

 

3. File Servers

  • Description: File servers store and manage files that can be accessed and shared across a network by users and other devices.
  • Popular File Server Software:
    • Samba: Allows file sharing between Linux/Unix and Windows systems.
    • NFS (Network File System): A protocol for sharing files across Unix/Linux systems.
    • FTP Servers (vsftpd, ProFTPD): Used for transferring files over FTP.
  • Common Use: File sharing, backup solutions, and cloud file storage systems.

Why Linux?

  • Linux supports a wide range of file-sharing protocols and can manage large storage volumes, making it an ideal choice for file serving and network storage solutions.

 

4. Mail Servers

  • Description: Mail servers handle the sending, receiving, and storage of email messages.
  • Popular Mail Server Software:
    • Postfix: A highly configurable and secure mail transfer agent (MTA).
    • Exim: Another MTA that is commonly used for email routing and delivery.
    • Dovecot: A mail delivery agent (MDA) used for IMAP and POP3 services.
    • Roundcube: A webmail interface that integrates with email servers.
  • Common Use: Email hosting for businesses, institutions, and ISPs.

 

Why Linux?

  • Linux is known for its strong security, performance, and reliability, making it an ideal platform for handling email communication and managing high volumes of email traffic.

 

5. Application Servers

  • Description: Application servers host applications and provide runtime environments for web and enterprise applications.
  • Popular Application Server Software:
    • Apache Tomcat: A servlet container for Java-based applications.
    • JBoss (WildFly): A Java application server for enterprise-grade applications.
    • GlassFish: An open-source application server for Java EE.
  • Common Use: Running Java-based applications, enterprise resource planning (ERP) systems, customer relationship management (CRM), and other software.

 

Why Linux?

  • Linux’s performance and stability are key for managing large-scale application environments, especially for high-availability systems and enterprise-level applications.

 

6. Virtualization Servers

  • Description: Virtualization servers create and manage virtual machines (VMs) on physical hardware, allowing the consolidation of server resources.
  • Popular Virtualization Software:
    • KVM (Kernel-based Virtual Machine): A full virtualization solution for Linux.
    • QEMU: A hardware emulator that works with KVM for virtualization.
    • Xen: A hypervisor that supports running multiple operating systems.
    • Docker: While not a full hypervisor, Docker uses containerization to virtualize applications and services.
  • Common Use: Running multiple virtual machines or containers on a single physical server for resource optimization, cloud computing, and microservices.

 

Why Linux?

  • Linux is highly efficient in virtualized environments due to its lightweight nature and strong support for containerization and virtualization technologies like KVM and Docker.

 

7. DNS Servers

  • Description: DNS servers translate domain names (e.g., www.example.com) into IP addresses, enabling devices to locate each other over the internet.
  • Popular DNS Server Software:
    • BIND (Berkeley Internet Name Domain): The most common DNS server software.
    • dnsmasq: A lightweight DNS and DHCP server often used in smaller environments.
  • Common Use: Hosting DNS records for websites, email servers, and managing local network DNS for internal systems.

 

Why Linux?

  • Linux is known for running DNS servers reliably and securely, with BIND being one of the most widely used DNS software options, widely supported on Linux.

 

8. Proxy Servers

  • Description: Proxy servers act as intermediaries between users and the internet, often used to filter content, monitor traffic, and improve security.
  • Popular Proxy Server Software:
    • Squid: A widely used proxy server and web cache.
    • HAProxy: A fast, high-availability load balancer and reverse proxy.
  • Common Use: Content filtering, load balancing, and improving web performance.

 

Why Linux?

  • Linux’s flexibility and performance make it ideal for proxy server applications, especially when managing large amounts of network traffic or providing security and caching services.

 

9. Backup Servers

  • Description: Backup servers are used to back up and recover data for systems, networks, and cloud environments.
  • Popular Backup Software:
    • rsync: A command-line tool for file synchronization and backup.
    • Bacula: A network-based backup solution for managing backup, recovery, and verification.
    • Amanda: An open-source backup solution for backing up data to disk or tape.
  • Common Use: Backing up critical data, disaster recovery, and long-term storage.

 

Why Linux?

  • Linux provides robust tools for data backup and recovery, is stable for long-term use, and can easily integrate with networked storage systems.

 

10. Gaming Servers

  • Description: Gaming servers host multiplayer online games and manage communication between players.
  • Popular Gaming Server Software:
    • SteamCMD: A command-line tool for installing and updating game servers for Steam-based games.
    • Minecraft Server: The official server software for hosting Minecraft multiplayer games.
    • Source Engine: For games like Counter-Strike and Team Fortress.
  • Common Use: Hosting multiplayer games, managing gaming communities, and enabling online gaming experiences.

 

Why Linux?

  • Linux offers high-performance gaming servers and is favored by many gaming companies for its flexibility, low overhead, and excellent community support.

 

11. Cloud Servers

  • Description: Cloud servers provide on-demand computing resources over the internet. Many cloud platforms run on Linux.
  • Popular Cloud Platforms:
    • Amazon Web Services (AWS): The largest cloud platform, which supports Linux instances.
    • Google Cloud Platform (GCP): Offers Linux-based virtual machines and services.
    • Microsoft Azure: While known for Windows, Azure also supports Linux workloads.
  • Common Use: Hosting applications, websites, and services in a cloud environment.

 

Why Linux?

  • Linux is the dominant operating system for cloud environments due to its flexibility, open-source nature, and compatibility with containerization technologies (Docker, Kubernetes).
Why to learn Red Hat Linux
RHCSA RHCSE
Redhat Sylbus

After Completing both RHCSA RHCSE

After completing both RHCSA (Red Hat Certified System Administrator) and RHCE (Red Hat Certified Engineer), your career prospects expand significantly. These certifications demonstrate both your administrative skills and automation expertise, making you a strong candidate for roles in Linux system administration, DevOps, cloud engineering, and more.

 Key Skills You Now Have (Post RHCSA + RHCE):

  • Advanced Linux administration (users, services, security, networking)

  • Shell scripting and automation

  • Ansible for configuration management

  • Troubleshooting, SELinux, firewalld, systemd, LVM

  • Real-world understanding of enterprise Linux environments

 

 Career Opportunities After RHCSA + RHCE

Here are job roles commonly open to RHCE-certified professionals:

1. Linux System Administrator (L2/L3)

  • Role: Administer, monitor, and troubleshoot complex Linux server environments.

  • You’ll handle: Web servers, mail servers, firewalls, backups, user management.

  • Salary (India): ₹5 – ₹10 LPA

  • Salary (US): $70,000 – $100,000+

 

2. DevOps Engineer

  • Role: Automate infrastructure using Ansible, CI/CD pipelines, Docker/Kubernetes.

  • RHCE Advantage: Ansible is part of RHCE — critical for DevOps.

  • You should also learn: Git, Jenkins, Docker, Terraform, Kubernetes (if not already).

  • Salary (India): ₹7 – ₹15+ LPA

  • Salary (US): $90,000 – $130,000+

 

3. Cloud Infrastructure Engineer / Administrator

  • Role: Manage cloud-based Linux systems (AWS, Azure, GCP).

  • Required Add-on Skills: AWS/GCP basics, CLI tools, EC2, IAM, S3, etc.

  • Cert Add-on: AWS Certified SysOps / Solutions Architect

  • RHCE helps: Automation + Linux fundamentals

  • Salary (India): ₹8 – ₹18 LPA

  • Salary (US): $90,000 – $140,000+

 

4. Site Reliability Engineer (SRE)

  • Role: Maintain uptime, scale infrastructure, automate recovery processes.

  • Key Skills: Linux + monitoring + automation + coding/scripting.

  • Tools: Prometheus, Grafana, Terraform, Kubernetes

  • Ideal path: RHCE → DevOps → SRE

 

5. Platform / Infrastructure Engineer

  • Role: Work on underlying Linux systems powering applications or containers.

  • Scripting & Ansible knowledge is critical

  • Often overlaps with cloud and DevOps tasks

 

6. IT Automation Engineer

  • Focus: Automating repetitive sysadmin tasks using Ansible, shell, or Python.

  • RHCE gives you a strong start here, especially with Ansible playbooks and roles.

 

Sample Job Titles to Search For

When searching for jobs, look for titles like:

(more…)

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