Skip to content
GitHub

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

Sections

Section titled “Sections”

Everyday Use — 5 modules

Section titled “Everyday Use — 5 modules”

Essential Linux skills for daily work.

#ModuleTime
0.1The CLI Power User30 min
0.2Environment & Permissions30 min
0.3Process & Resource Survival Guide30 min
0.4Services & Logs Demystified30 min
0.5Everyday Networking Tools30 min

System Essentials — 4 modules

Section titled “System Essentials — 4 modules”

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

#ModuleTime
1.1Kernel Architecture25-30 min
1.2Processes & systemd30-35 min
1.3Filesystem Hierarchy25-30 min
1.4Users & Permissions25-30 min

Container Primitives — 4 modules

Section titled “Container Primitives — 4 modules”

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

#ModuleTime
2.1Linux Namespaces30-35 min
2.2Control Groups (cgroups)30-35 min
2.3Capabilities & Linux Security Modules25-30 min
2.4Union Filesystems25-30 min

Networking — 4 modules

Section titled “Networking — 4 modules”

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

#ModuleTime
3.1TCP/IP Essentials30-35 min
3.2DNS in Linux25-30 min
3.3Network Namespaces & veth30-35 min
3.4iptables & netfilter35-40 min

Security — 4 modules

Section titled “Security — 4 modules”

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

#ModuleTime
4.1Kernel Hardening25-30 min
4.2AppArmor Profiles30-35 min
4.3SELinux Contexts35-40 min
4.4seccomp Profiles25-30 min

Operations — 16 modules

Section titled “Operations — 16 modules”

Performance analysis, troubleshooting, shell scripting, system administration.

System Administration — 4 modules

Section titled “System Administration — 4 modules”
#ModuleTime
8.1Storage Management30-35 min
8.2Network Administration30-35 min
8.3Package & User Management25-30 min
8.4Scheduling & Backups25-30 min

Performance — 4 modules

Section titled “Performance — 4 modules”
#ModuleTime
5.1The USE Method25-30 min
5.2CPU & Scheduling30-35 min
5.3Memory Management30-35 min
5.4I/O Performance25-30 min

Troubleshooting — 4 modules

Section titled “Troubleshooting — 4 modules”
#ModuleTime
6.1Systematic Troubleshooting25-30 min
6.2Log Analysis25-30 min
6.3Process Debugging30-35 min
6.4Network Debugging30-35 min

Shell Scripting — 4 modules

Section titled “Shell Scripting — 4 modules”
#ModuleTime
7.1Bash Fundamentals30-35 min
7.2Text Processing30-35 min
7.3Practical Scripts25-30 min
7.4DevOps Automation30-35 min

Suggested Order

Section titled “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.

Why This Track Matters for Kubernetes

Section titled “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

Certification: LFCS

Section titled “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.

ResourceLink
LFCS Learning PathLFCS Certification
Exam DetailsLinux Foundation LFCS

After This Track

Section titled “After This Track”