For beginners, Here are some essential Linux topics to start with.

1. Introduction to Linux: Understand the basics of what Linux is, its history, and its advantages compared to other operating systems.

2. Linux Distributions: Learn about different Linux distributions such as Ubuntu, Fedora, Debian, and Cent OS. Understand their features, target audience, and how to choose the right distribution for your needs.

3. Linux File System: Familiarize yourself with the Linux file system hierarchy, including directories like /home, /etc, /var, and /bin. Learn how to navigate the file system and work with files and directories.

4. Command-Line Interface (CLI): Gain an understanding of the Linux command-line interface and how to use essential commands like cd, ls, mkdir, cp, mv, rm, and grep. Learn about command syntax, options, and arguments.

5. Package Management: Explore package management systems like APT (Advanced Package Tool) or YUM (Yellowdog Updater, Modified) to install, update, and remove software packages. Understand how to use package repositories and package managers to manage software on your Linux system.

6. User and Group Management: Learn how to create, modify, and delete user accounts and groups in Linux. Understand user permissions and access control, including file ownership and permission settings.

7. Shell Scripting: Get started with shell scripting using bash (Bourne Again Shell) or another shell. Learn how to write simple scripts to automate tasks and perform repetitive actions.

8. Networking: Understand basic networking concepts in Linux, including IP addressing, network configuration, and troubleshooting network connectivity issues. Learn how to use tools like ifconfig, ping, and netstat.

9. System Monitoring and Maintenance: Explore tools and techniques for monitoring system performance, managing processes, and troubleshooting common issues in Linux. Learn about log files, system resource monitoring, and package updates.

10. Security: Gain awareness of essential Linux security practices, including user management, permissions, firewalls, and system updates. Understand the importance of keeping your Linux system secure.

Remember, learning Linux is a gradual process, and it’s essential to practice and explore different topics at your own pace. As you gain proficiency in the basics, you can gradually expand your knowledge and delve into more advanced Linux topics.