Linux is an operating system, or a kernel created by Linus Torvalds with other contributors. It was first released on September 17, 1991. The main advantage of Linux is that it is distributed under an open-source license, which means programmers can use the Linux Kernel to design their own custom operating systems. Most Linux code is written in C Programming Language.
Some of the most popular operating systems that use Linux as a kernel are Debian, Knoppix, Ubuntu, and Fedora. Nevertheless, the list does not end here as there are thousands of operating systems based on Linux which offer a variety of functions to users.
Linux System Administration:
Linux is a major strength in computing technology. Most web servers, mobile phones, personal computers, supercomputers, and cloud servers are powered by Linux. The job of a Linux systems administrator is to manage the operations of a computer system like maintaining, enhancing, creating user accounts/reports, and taking backups using Linux tools and command-line interface tools. Most computing devices are powered by Linux because of its high stability, high security, and open-source environment. There are some of the things that a Linux system administrator should know and understand:
Linux File Systems
A Linux system administrator should have a solid knowledge and understanding of the various Linux file systems used by Linux like Ext2, Ext3, and Ext4. Understanding the difference between these file systems is important so that one can easily perform tasks and partition disks or configure Linux file system permissions.
The Linux File System Hierarchy (FHS) tells us about the location and structure of directories and files on a Linux system. It is important for managing system files effectively.
Managing Root/Super User
The root user is the most powerful user on a Linux System because it has access to all the system files and directories. So, it is important for maintaining system security.
The default shell of Linux is Bash, and it is used for executing commands on the command-line interface. A Linux system administrator should have a basic understanding of the command of bash to perform tasks.
Managing files, directories and users is a critical part of Linux system administration. A system administrator should be able to perform the basic file and directory management tasks.
Duties of a Linux Administrator:
Linux System Administration has become a solid criterion for an organization and institute that requires a solid IT foundation. Hence, the need for efficient Linux administrators is a requirement of the time. The job profile might change from each organization as there may be added responsibilities and duties to the role. Below are some duties of a Linux System Administrator:
- Maintain all internet requests inclusive to DNS, RADIUS, Apache, MySQL, PHP.
- Taking regular back up of data, create new stored procedures and listing back-up is one of the duties.
- Analyzing all error logs and fixing along with providing excellent customer support for Webhosting, ISP and LAN Customers on troubleshooting increased support troubles.
- Communicating with the staff, vendors, and customers in a cultivated, professional manner at all times has to be one of his characteristics.
- Enhance, maintain and create the tools for the Linux environment and its users.
- Detecting and solving the service problems ranging from disaster recovery to login problems.
- Installing the necessary systems and security tools. Working with the Data Network Engineer and other personnel/departments to analyze hardware requirements and makes acquiring recommendations.
- Troubleshoot, when a problem occurs in the server.
Steps to Start the Career as Linux System Administrator:
- Install and learn to use Linux environment.
- Get Certified in Linux administration.
- Learn to do Documentation.
- Joining up with a local Linux Users Group or Community for Support and Help
In short, the main role of the Linux Systems Administrator is to manage the operations like installing, observing the software and hardware systems and taking backup. And also have a good ability to describe an In-depth understanding of technical knowledge. Even freshman-level Professionals have great possibilities for the position of System Administrator with the yearly median salary is around INR 3 Lacs, salary increase with an increase in job experience. To get the experience you need to check for the latest skills and learning in the Linux community.
Frequently asked questions about Linux System Administrator.
What is Linux System Administrator?
Linux System Administrator involves the installation, configuration, maintenance and management of Linux-based systems.
How do I become a Linux System Administrator?
To become a Linux System Administrator, we need a combination of education, experience, and certification. You can pursue certifications such as CompTIA Linux+, Red Hat Certified Systems Administrator (RHCSA), or Linux Professional Institute Certificate (LPIC).
Some of the basic commands used in Linux System Administration include.
- ls (list files and directories)
- cd (change directory)
- mkdir (make directory)
- rm (remove files and directories)
- cp (copy files)
- mv (move or rename files)
- chmod (change file permissions)
What is a Linux kernel and what is its role in System Administrator?
The Linux Kernel is the core of the Linux operating system, which is responsible for managing system resources like CPU, input/output devices, memory and file system. The System Administrator should understand the kernel configuration so that he/she can optimize system performance and troubleshoot issues.
Linux is a powerful and widely used operating system which is most widely used in an open-source environment. A Linux system administrator has a very critical role in managing and maintaining Linux-based systems. We have discussed that a system administrator should have good knowledge in file system, file hierarchy, root user management, basic Bash commands and file, directory, and user handling.
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