Linux

Essential Linux knowledge for Kubernetes and DevOps practitioners.

Every container issue is ultimately a Linux issue. This track gives you the deep system knowledge that separates operators from debuggers.

37 modules across 6 sections · ~50 hours total

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Start Here If

• you want stronger debugging and systems intuition
• Kubernetes networking, storage, or security still feels like magic
• you want to become reliable under pressure instead of memorizing commands

You Do Not Need All Of Linux Before Moving On

Many learners should take Linux as a depth track, not as a complete blocker before every other path.

If your goal is:

• Kubernetes admin: prioritize Everyday Use, System Essentials, Networking, and Troubleshooting
• AI/ML engineering: prioritize Everyday Use, Environment & Permissions, Services & Logs, and basic Networking
• On-prem operations: take the full track or close to it

Sections

Everyday Use — 5 modules

Essential Linux skills for daily work.

#	Module	Time
0.1	The CLI Power User	30 min
0.2	Environment & Permissions	30 min
0.3	Process & Resource Survival Guide	30 min
0.4	Services & Logs Demystified	30 min
0.5	Everyday Networking Tools	30 min

System Essentials — 4 modules

Kernel, processes, filesystem, permissions — the foundation of everything.

#	Module	Time
1.1	Kernel Architecture	25-30 min
1.2	Processes & systemd	30-35 min
1.3	Filesystem Hierarchy	25-30 min
1.4	Users & Permissions	25-30 min

Container Primitives — 4 modules

The Linux features that make containers work — namespaces, cgroups, capabilities, overlay filesystems.

#	Module	Time
2.1	Linux Namespaces	30-35 min
2.2	Control Groups (cgroups)	30-35 min
2.3	Capabilities & Linux Security Modules	25-30 min
2.4	Union Filesystems	25-30 min

Networking — 4 modules

TCP/IP, DNS, network namespaces, iptables — the network stack that Kubernetes builds on.

#	Module	Time
3.1	TCP/IP Essentials	30-35 min
3.2	DNS in Linux	25-30 min
3.3	Network Namespaces & veth	30-35 min
3.4	iptables & netfilter	35-40 min

Security — 4 modules

Kernel hardening, AppArmor, SELinux, seccomp — securing the host that runs your containers.

#	Module	Time
4.1	Kernel Hardening	25-30 min
4.2	AppArmor Profiles	30-35 min
4.3	SELinux Contexts	35-40 min
4.4	seccomp Profiles	25-30 min

Operations — 16 modules

Performance analysis, troubleshooting, shell scripting, system administration.

System Administration — 4 modules

#	Module	Time
8.1	Storage Management	30-35 min
8.2	Network Administration	30-35 min
8.3	Package & User Management	25-30 min
8.4	Scheduling & Backups	25-30 min

Performance — 4 modules

#	Module	Time
5.1	The USE Method	25-30 min
5.2	CPU & Scheduling	30-35 min
5.3	Memory Management	30-35 min
5.4	I/O Performance	25-30 min

Troubleshooting — 4 modules

#	Module	Time
6.1	Systematic Troubleshooting	25-30 min
6.2	Log Analysis	25-30 min
6.3	Process Debugging	30-35 min
6.4	Network Debugging	30-35 min

Shell Scripting — 4 modules

#	Module	Time
7.1	Bash Fundamentals	30-35 min
7.2	Text Processing	30-35 min
7.3	Practical Scripts	25-30 min
7.4	DevOps Automation	30-35 min

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Suggested Order

Everyday Use → System Essentials → Container Primitives → Networking → Security → Operations

Start with Everyday Use if you’re new to Linux. Jump to Container Primitives if you already know the basics and want to understand how containers work under the hood.

Common Routes From Linux

• go to Kubernetes Certifications if you want hands-on admin and developer paths
• go to On-Premises Kubernetes if private infrastructure is your target
• go to Platform Engineering if you want to turn systems knowledge into reliability and platform judgment
• go to AI/ML Engineering if you need just enough systems depth to support serious ML or inference work

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Why This Track Matters for Kubernetes

• Namespaces and cgroups ARE containers — understanding these demystifies container technology
• Network policies use iptables/eBPF — can’t debug networking without understanding the stack
• Security contexts use capabilities/AppArmor/seccomp — pod security requires Linux security knowledge
• Resource limits are cgroup configurations — understanding cgroups explains K8s resource management

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Certification: LFCS

The Linux Foundation Certified System Administrator (LFCS) certification is included in this track. The Linux modules above cover all LFCS exam domains — system essentials, networking, storage, security, and operations.

Resource	Link
LFCS Learning Path	LFCS Certification
Exam Details	Linux Foundation LFCS

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After This Track

• Kubernetes Certifications — CKA, CKAD, CKS — Linux knowledge is essential for these exams
• Cloud — learn the hyperscalers that run your clusters
• On-Premises Kubernetes — run K8s on bare metal
• Platform Engineering — build on the foundation
• Cloud Native Tools — explore the CNCF ecosystem