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Beginner → Medium16 hours

Linux Administration

Learn practical Linux administration end to end: the shell and filesystem, users and permissions, processes and services, packages, storage, networking and SSH, security hardening, Bash automation, and real production troubleshooting — on a browser workspace with synthetic servers.

Recommended first:Cyber Foundations
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Log AnalysisNetwork AnalysisIncident Triage

What you will be able to do

  • Navigate the filesystem and manage users, groups, ownership and permissions.
  • Manage processes, services (systemd), packages, storage, networking and SSH.
  • Harden a server: sudo, SSH, firewall awareness, patching and backups.
  • Write safe Bash automation and troubleshoot a broken production server from evidence.

Units

  1. 01

    Linux Foundations

    The shell, the filesystem hierarchy, navigating and viewing files, and users/groups/ownership/permissions.

    BeginnerAvailable

    Why you are learning this

    Everything else on a Linux box builds on the shell, the filesystem and the permission model — get these right and the rest follows.

    Unit contents5

    Theory Lessons(4)

    Practical Labs(1)

  2. 02

    System Administration

    Processes and signals, services under systemd, package management, storage/filesystems, networking, SSH, scheduling and logs.

    BeginnerAvailable

    Why you are learning this

    This is day-to-day operations: keeping services running, software updated, disks healthy and the box reachable.

    Unit contents5

    Theory Lessons(4)

    Practical Labs(1)

  3. 03

    Security & Reliability

    sudo, account security, SSH hardening, firewall and service-exposure awareness, patching, backups and a troubleshooting mindset.

    Job-ReadyAvailable

    Why you are learning this

    A server that runs is not enough; it must be defensible and recoverable. This module is the difference between a hobby box and a production one.

    Unit contents4

    Theory Lessons(4)

  4. 04

    Bash & Automation

    Variables, conditions, loops, functions, pipes, grep/regex awareness, JSON/CSV handling and safe scripting.

    Job-ReadyAvailable

    Why you are learning this

    Automation removes repetitive toil and human error — but an unsafe script at scale is a fast way to break a fleet, so safety is part of the craft.

    Unit contents4

    Theory Lessons(4)

  5. 05

    Advanced Administration

    Performance awareness, storage and networking troubleshooting, systemd diagnostics, log-driven investigation, configuration-management/Ansible awareness and production operations.

    Job-ReadyAvailable

    Why you are learning this

    Real incidents are diagnosed from evidence — metrics, logs, systemd state — not guesses. This module builds the methodical troubleshooting a production admin relies on.

    Unit contents6

    Theory Lessons(4)

    Practical Labs(2)