What Linux skills do you need to be a great System Administrator?

While using Linux, one should be confident using some of the basics commands that can be using in command line Interface, For example : grep command- that can be used for finding/searching for a pattern in a file. ls command- that list files and directories in the current location. mv command- that move or rename a file or directory. tar command- for creating a tar archive along with the numerous options depending upon the situation. yum install- Installing a package on Red Hat/Fedora systems. The more comfortable with these commands, the more efficiently one can manage and troubleshoot the Linux system

need proficiency in the following key areas: 1. Command Line Interface (CLI) proficiency. 2. System configuration and management. 3. Networking and security. 4. File system management. 5. Monitoring and performance tuning.

To excel as a System Administrator in Linux environments, proficiency in command-line operations, shell scripting, and system configuration is essential. A strong understanding of Linux file systems, permissions, and networking concepts is crucial for effective management and troubleshooting. Additionally, expertise in package management, system monitoring, and security administration is vital for maintaining stable and secure Linux systems. Familiarity with automation tools such as Ansible, as well as experience in virtualization and containerization technologies like Docker and Kubernetes, further enhance a System Administrator's ability to deploy and manage complex Linux-based infrastructures efficiently.

User and group management in Linux is a crucial aspect of system administration, allowing administrators to control access, permissions, and organizational structures on a system. Users are individuals who interact with the system, while groups are collections of users with shared access rights. For Example: One can add/remove users and groups depending upon the requirement by using useradd/ userdel command. Also can create group and assign them for the users by using groupadd/groupdel command. In Addition to these usage, Some can change the group ownership using chown command. At last comes the the sudo command allows authorized users to perform administrative tasks, such as installing or removing software, modifying system configurations

Processes in Linux represent running instances of programs or tasks and Systemd is the init system used by many modern Linux distributions, It handles the initialization of the system and manages services. Here are some examples : ps command - Lists currently running processes. top command - Provides a dynamic, real-time overview of system processes. kill -9 [process_id] - Forces the termination of a process (be cautions while running this command) systemctl start [service_name] - Starting a service. systemctl enable [service_name] - Enabling a service to start at boot. systemctl status [service_name] - Displays detailed information about the status of a service. journalctl -u [service_name] - Views the logs for a specific service.

Having command line knowledge is essential. From there, one should learn Vim, regular expressions, and setting up basic httpd services and MySQL. One could then build from there.

To be a expert Unix/Linux system admin : you should have you own virtual machine in your home computer and have a Virtual Linux machine inside it and be aware of the below : - Learn Basic Linux Commands: cd , pwd , mkdir , touch , cp , mv , rm , cat , man , sudo - Understand the File System Hierarchy - Master the Linux Shell: Choose a shell, such as Bash, and learn its scripting capabilities - Network and Internet Basics : Learn about networking including configuring network interfaces, setting up a firewall (e.g., iptables), and using tools like ping, ifconfig, and netstat. - Text Editors: Familiarize yourself with text editors like Nano, Vim, vi - Explore Package Management : how to use RPM to ( install , download , update )