Linux System Administration

Weeks 1–8 (Linux System Administration – Full Content)

Linux System Administration involves managing and maintaining Linux-based operating systems to ensure optimal performance, security, and reliability. Key responsibilities include:

1. User & Group Management – Creating, modifying, and managing user accounts and permissions.
2. File System & Storage – Managing partitions, disks, LVM, and file permissions.
3. Package Management – Installing, updating, and removing software using tools like apt, yum, or dnf.
4. Process & Service Management – Controlling system services (systemd, init) and monitoring processes.
5. Networking & Security – Configuring firewalls (iptables, firewalld), SSH, and network settings.
6. System Monitoring & Logs – Using tools like top, htop, journalctl, and log files (/var/log) for troubleshooting.
7. Automation & Scripting – Writing shell scripts (Bash) and scheduling tasks (cron, at).
8. Backup & Recovery – Implementing backup strategies and disaster recovery plans.

A Linux sysadmin ensures system stability, security, and efficiency, often working in servers, cloud environments, or DevOps setups.