Learn Linux Administration: A Step-by-Step Course for Beginners

[Haritha T]

The operating system you are using is the most crucial element of your workstation. All your hardware and software applications run on your operating system. So, it goes without saying that their security, scalability, flexibility, and overall function depend largely on the OS. Linux is a scalable and versatile operating system popular among IT managers. This open-source operating system is designed to be studied and modified.

Today, most of us are familiar with Windows and macOS. Linux is often mentioned when it comes to popular operating systems, but what exactly is it used for and what sets it apart from other OS? Let’s learn more about Linux, the reasons you should pursue Linux admin courses, and some basic steps for becoming a Linux admin.

Linux Overview and Applications

Linux is primarily for the IT industry. But its uses go beyond the tech world. Android devices, for instance, operate on a Linux-based OS. It also powers many hardware devices, including but not limited to, vehicle dashboards, smartwatches, and fridges. Linux course is highly recommended for individuals planning to build a career in the DevOps industry. Since its applications mainly involve the IT industry, it improves your chances of securing the DevOps engineer position in a recognized firm. You might wonder what’s the difference between Linux and Windows.

Windows doesn’t require in-depth training or prior knowledge of how to use the system. It’s fairly easy to use and has a short learning curve. Most Windows programs and games are commercial, while Linux is a free-source operating system and thus has a vast community that’s ready to help beginners through forums and other channels. Flexibility is one of the best features of Linux OS. It’s designed to support just about any software and run on various hardware devices, making it suitable for IT professionals and other users.

Components of Linux

Understanding the various components of the operating system will help you get fundamental knowledge of the system. You need to start with the basics before proceeding to the Linux administration course. Here are some crucial components that make up the entire architecture of Linux.

Kernel: Linux’s Kernel ensures there’s sufficient storage for the apps to launch on the operating system successfully. It also facilitates communication between the hardware and the user. Simply put, the kernel of an operating system is responsible for managing all primary functions, including networking, memory, file systems, device control, and so on.

System Libraries: Using system libraries, different applications, as well as programs in your system, can use Kernel without requiring access rights. It makes it easier for the developers to reuse the same codes over and over again, thus eliminating the need for creating new codes.

Hardware Layer: It is composed of all the hardware devices used in the Linux environment, including the CPU, RAM, HDD, and more. These devices need a kernel to interact with the end user and process their requests effectively.

Shell: Then, we have the Shell, which acts as the intermediary between the Kernel and the end user. The Shell is a must in every Linux, as its function is to understand and act on the user’s command. It sends these commands to the Kernel, which then performs the required action.

Understanding Permission Settings in Linux

All kinds of files, folders, and directories in this operating system have pre-set permissions that determine which user has what level of permission. Like other operating systems, the permission settings in Linux consist of:

• Read: It allows the user to scan the file. They can read it but can’t edit or modify the file.
• Write: This permission setting enables users to modify the files, create new ones, or change the existing ones completely. Basically, it gives users the right to edit the file however they like.
• Execute: For file execution and the ability to access the directory, you need permission to execute a file.

There are different commands for adjusting the permission levels and adding or removing people from the list.

Responsibilities of a Linux Admin

Now that you know what Linux is and how it’s different from Windows, the next important question is what role does a Linux admin play? As the name suggests, a Linux administrator is an IT professional managing all Linux-related operations.

They know the ins and outs of the system and can manage all sorts of issues, ranging from technical glitches to coding errors in the system efficiently. These IT professionals manage the hardware and software elements running on the operating system to ensure the smooth functioning of all programs and the efficiency of the overall system.

Linux admins work with software developers, DevOps engineers, and other professionals from the IT operation team to handle the technical aspect of the device. In addition, they might specialize in automation and cloud computing. Ensuring security of the Linux is their main concern and their main goal is to improve the performance of the system. Their main responsibilities include:

• Updating the software applications when required

• Running maintenance checks regularly to ensure optimal system performance

• Handling user queries and complaints

• Teaching other admins and professionals the basics of Linux systems

To become a Linux administrator, you must complete your bachelor’s and master’s degrees in computer science, maths, software engineering, and other relevant fields. Signing up for additional Linux admin courses that come with a certification is a bonus. Once you have completed the training programs, you can start practicing the installation of Linux and its management.

Some popular skills that every IT company expects from a Linux administrator include good communication, collaboration, decision-making, and attention to detail. In addition, you need a set of hard skills. This include knowledge of Linux file systems, command lines, backup and disaster recovery. It also include security and firewall applications, and so on.

Bottom Line

That was all about Linux concepts, its core elements, and the steps to becoming a professional and certified Linux admin. After completing your bachelor’s and master’s degrees, you can take Linux admin courses on Udemy, Coursera. Moreover, you can also search other reputable educational platforms. This way you can and become a certified Linux expert.