Linux · Ops

Linux Administration Tutorial

A complete Linux administration path: filesystem, users, systemd, networking, packages, storage, security hardening, and ops capstones.

65 lessonsBeginner → ProDevOps

Start from the beginning

Curriculum

Work through each section in order. Every lesson ends with practice and key points so the idea sticks.

Beginner

Getting Started

5 lessons · ~55 min

1
Welcome to Linux Administration
Operate servers with confidence.
11 min
2
Distributions Overview
Debian/Ubuntu vs RHEL/Fedora families.
11 min
3
Install & Cloud VMs
Local VM or cloud instance lab setup.
11 min
4
Terminal Survival
Shell, prompts, and keyboard fluency.
11 min
5
man & --help
Learn any command from its docs.
11 min

Beginner

Filesystem

5 lessons · ~55 min

6
Filesystem Hierarchy
/etc, /var, /home, /usr, /opt.
11 min
7
Navigation
cd, ls, pwd, tree.
11 min
8
Files & Directories
cp, mv, rm, mkdir, ln.
11 min
9
Permissions
rwx, chmod, chown, umask.
11 min
10
Finding Files
find, locate, which, type.
11 min

Beginner

Users & Processes

5 lessons · ~55 min

11
Users & Groups
useradd, usermod, /etc/passwd.
11 min
12
sudo & Root
Least privilege administration.
11 min
13
Processes
ps, top, htop, kill.
11 min
14
Job Control
bg, fg, nohup, disown.
11 min
15
systemd Services
systemctl start/enable/status.
11 min

Beginner

Packages & Software

5 lessons · ~60 min

16
apt Basics
Install and update on Debian/Ubuntu.
11 min
17
dnf/yum Basics
RHEL-family package workflow.
11 min
18
Snaps/Flatpaks Overview
Alternative packaging systems.
11 min
19
Compiling From Source
When packages are not enough.
11 min
20
Project: Web Server Box
Install and serve a static site.
16 min

Beginner

Networking

5 lessons · ~58 min

21
IP Addressing
ip addr, routes, DNS basics.
11 min
22
ss & Listening Ports
See what is bound.
11 min
23
Firewall Intro
ufw/firewalld mental model.
11 min
24
SSH Hardening
Keys, disable password, config.
11 min
25
Project: Secure SSH Access
Key-only login checklist.
14 min

Intermediate

Storage

5 lessons · ~65 min

26
Disks & Partitions
lsblk, fdisk overview.
13 min
27
Filesystems & Mounts
mkfs, mount, /etc/fstab.
13 min
28
LVM Intro
Flexible volume management.
13 min
29
Quotas Overview
Limit user disk usage.
13 min
30
Backups Mindset
3-2-1 and restore testing.
13 min

Intermediate

Logs & Monitoring

5 lessons · ~68 min

31
journalctl
Query systemd logs.
13 min
32
/var/log
Classic log files still matter.
13 min
33
logrotate
Prevent disks filling with logs.
13 min
34
Resource Monitoring
free, df, iostat, vmstat.
13 min
35
Project: Incident Triage
Diagnose a full disk or high CPU.
16 min

Intermediate

Automation & Config

5 lessons · ~70 min

36
Cron & Timers
Schedule admin tasks.
13 min
37
Shell Scripting for Admins
Safe scripts with set -euo pipefail.
13 min
38
Configuration Management Preview
Ansible mental model.
13 min
39
Infrastructure as Code Preview
Terraform direction.
13 min
40
Project: Bootstrap Script
Idempotent server setup script.
18 min

Intermediate

Containers & Cloud

5 lessons · ~70 min

41
Docker on Linux
Engine install and first container.
13 min
42
systemd + Docker
Restart policies and services.
13 min
43
Cloud Metadata
Think like a cloud admin.
13 min
44
Object Storage Concepts
S3-compatible backups.
13 min
45
Project: Containerized App Host
Run nginx reverse proxy to an app.
18 min

Intermediate

Security Hardening

3 lessons · ~39 min

46
Updates & CVE Hygiene
Patch cadence that is real.
13 min
47
Fail2ban / Intrusion Basics
Reduce noisy attacks.
13 min
48
SELinux/AppArmor Overview
Mandatory access control ideas.
13 min

Advanced

Security Hardening

2 lessons · ~32 min

49
Secrets on Servers
Never bake secrets into images.
16 min
50
Project: Hardening Checklist
Apply a 15-point baseline.
16 min

Advanced

Capstone & Career

10 lessons · ~170 min

51
Capstone: Production-like VM
Users, firewall, nginx, TLS stub, monitoring.
22 min
52
Capstone: Broken Server Drill
Fix networking/service failures under time.
20 min
53
Linux Interview Review
Permissions, processes, systemd, networking.
16 min
54
Next Steps
SRE, platform engineering, or security ops.
16 min
55
Final Challenge
Document a runbook for restarting a stack.
16 min
56
Glossary Drill
inode, daemon, unit, CIDR, journal.
16 min
57
Performance Checklist
CPU, RAM, disk, network bottlenecks.
16 min
58
Disaster Recovery Drill
Restore from backup successfully.
16 min
59
Portfolio Tips
Show labs with diagrams and configs.
16 min
60
Ethics & Responsibility
Admin access is production trust.
16 min

Advanced

Practice Labs

5 lessons · ~80 min

61
Practice Lab 61
Hands-on practice lab consolidating earlier linux skills.
16 min
62
Practice Lab 62
Hands-on practice lab consolidating earlier linux skills.
16 min
63
Practice Lab 63
Hands-on practice lab consolidating earlier linux skills.
16 min
64
Practice Lab 64
Hands-on practice lab consolidating earlier linux skills.
16 min
65
Practice Lab 65
Hands-on practice lab consolidating earlier linux skills.
16 min

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Linux Administration Tutorial

Curriculum

Getting Started

Filesystem

Users & Processes

Packages & Software

Networking

Storage

Logs & Monitoring

Automation & Config

Containers & Cloud

Security Hardening

Security Hardening

Capstone & Career

Practice Labs