Linux is a popular operating system that powers many devices, from web servers and mobile phones to supercomputers and cloud platforms. Linux is open-source, which means anyone can modify and distribute it according to their needs. Linux is also known for its stability, security, and performance.
If you are interested in working with Linux, you might want to consider becoming a Linux server administrator. A Linux server administrator is a technical professional who specializes in maintaining and developing Linux infrastructure technology. A Linux server administrator is responsible for designing, implementing, and monitoring the Linux systems and servers, as well as providing support and troubleshooting to the users.
A Linux server administrator role can be challenging and rewarding, as you will be dealing with various tasks and technologies. Here are some of the things that you should know about the Linux server administrator role:
Linux File Systems: A Linux server administrator should have a solid knowledge and understanding of the various Linux file systems used by Linux, such as Ext2, Ext3, and Ext4. These file systems determine how data is stored and organized on the disk partitions. A Linux server administrator should be able to perform tasks such as creating, formatting, mounting, unmounting, checking, repairing, and resizing file systems.
File System Hierarchy: The Linux File System Hierarchy (FHS) defines the standard structure and location of directories and files on a Linux system. It is important for managing system files effectively and consistently. A Linux server administrator should be familiar with the FHS and its main components, such as /bin, /etc, /home, /usr, /var, etc.
Root/Super User: The root user is the most powerful user on a Linux system, as it has access to all the system files and directories. It can perform any operation on the system, such as installing software, changing settings, creating users, etc. However, with great power comes great responsibility. A Linux server administrator should be careful when using the root user, as it can also cause damage or compromise the system security if used incorrectly or maliciously. A Linux server administrator should follow the best practices of using the root user, such as using sudo command instead of logging in as root directly, limiting the root access to authorized personnel only, and auditing the root activities regularly.
Basic Bash Commands: Bash is the default shell of Linux, which is a program that allows users to interact with the system using commands. A Linux server administrator should have a basic understanding of the bash commands and syntax, as they are essential for performing various tasks on the system. Some of the common bash commands that a Linux server administrator should know are ls, cd, cp, mv, rm, mkdir, rmdir, cat, grep, find, ps, top, kill, ping, ssh, scp, etc.
Handling Files, Directories, and Users: Managing files, directories and users is a critical part of Linux system administration. A Linux server administrator should be able to perform the basic file and directory management tasks such as creating, deleting, renaming, copying, moving, changing permissions, and ownerships, etc. A Linux server administrator should also be able to create and manage users and groups on the system, assign them passwords, roles, and privileges, and monitor their activities and resource usage.
Duties of a Linux Administrator: A Linux administrator’s duties may vary depending on the organization and its requirements. However, some of the common duties of a Linux administrator are:
- Proactively maintain and develop all Linux infrastructure technology to ensure a 24x7x365 uptime service.
- Engineer solutions for various project and operational needs using Linux tools and technologies.
- Maintain best practices on managing systems and services across all environments.
- Fault finding, analysis, and logging information for reporting of performance exceptions.
- Proactively monitor system performance and capacity planning.
- Manage, coordinate, and implement software upgrades, patches, hot fixes on servers, workstations, and network hardware.
- Create and modify scripts or applications to perform tasks using languages such as Shell, Perl, or Python.
- Provide input on ways to improve the stability, security, efficiency, and scalability of the environment.
- Collaborate with other teams and team members to develop automation strategies and deployment processes.
- Provide support and troubleshooting to users and resolve issues related to Linux systems.
Qualifications of a Linux Administrator: To become a successful Linux administrator, you need to have certain qualifications such as:
- A bachelor’s degree in Computer Science, Information Systems or similar relevant field.
- Previous working experience as a Linux administrator for at least one year.
- In-depth knowledge of Linux: RedHat, CentOS, Debian, etc.
- Hands-on experience with MySQL and/or MariaDB.
- Familiarity with VMWare and SAN management and concepts.
- Expert in Shell, Perl, and/or Python scripting.
- Solid knowledge of protocols such as DNS, HTTP, LDAP, SMTP and SNMP.
- Additional Linux certifications (RHCT, RHCE and LPIC) will be considered an advantage.
- Strong problem-solving and communication skills.
A Linux server administrator role is a rewarding career path for anyone who loves working with Linux and has a passion for learning and improving their skills and knowledge. If you think you have what it takes to become a Linux server administrator, you can start by learning the basics of Linux and practicing your skills on your own or online platforms. You can also look for opportunities to gain experience and exposure by working on projects or internships related to Linux administration. You can also pursue further education or certification to enhance your credentials and credibility. With hard work, dedication, and enthusiasm, you can achieve your goal of becoming a Linux server administrator.