Site Map
How the site is organised
- Core Skills + Workflow (01–18) — the linear foundations path from Start Here: Linux through troubleshooting and glossary.
- Ansible — a parallel practice path (quickstart, tutorial, then deep dives), not a continuation of 18 by number.
- Other tracks — GitLab & CI, Platform, Identity & Auth, Observability, Containers, etc. Open what you need; order is not global.
- Guides — end-to-end workflows: infra change lifecycle, service troubleshooting, runbooks, incident first 15 minutes.
- Reference — indexes (this page, cheatsheet index).
Overview
Core Skills (foundations)
- 01 · Linux CLI
- 02 · SSH Keys
- 03 · Git Basics
- 04 · GitLab Basics
- 05 · YAML Basics
- 06 · Ansible
- 07 · Jinja2
- 08 · Certificates
- 09 · FreeIPA
Services
Workflow
Advanced
Ansible
- Quickstart (For Dummies)
- Learn Ansible (Tutorial)
- Best Practices & Refactoring
- Roles in Practice
- Project Structure
- Variable Precedence
- Debugging
- Testing
- Error Handling
- Performance
- Inventory Patterns
- Custom Modules
- Deploy Flow
- Handlers & Templates
- Tags
- Cheatsheet
GitLab & CI
Platform
- SELinux
- SELinux Debugging
- firewalld
- firewalld Rich Rules
- systemd & journalctl
- systemd Unit Authoring
- Linux Networking
- Bonding & Bridges
- LVM
- LVM Thin & Snapshots
Identity & Auth
- SSSD & Auth Flow
- Kerberos
- Keytab Rotation
- FreeIPA HBAC & Sudo
- FreeIPA Replication
- FreeIPA Dogtag Certs
- Windows 11 + FreeIPA
- FreeIPA CLI on Windows
- Keycloak on Windows + LDAPS
Config Literacy
File Sharing
Linux Tools
Services Deep Dive
- Postfix TLS & DKIM
- Dovecot Sieve & Quotas
- Nginx Reverse Proxy
- Apache GSSAPI SSO
- Squid SSL-Bump
- Rsyslog Forwarding
Core Skills Deep Dive
Observability
- Observability Overview
- Prometheus & node_exporter
- Grafana Basics
- Loki Logs
- OpenTelemetry Traces
- SLOs & On-Call
Backup & DR
Containers
IaC
Secrets
Data Plane
EL Lifecycle
Performance & Kernel
Identity Extended
HTTP Edge
Guides
- Infra Change Lifecycle
- Service Troubleshooting
- Generic
- Change Window Runbook
- Incident: First 15 Minutes
Reference
- Site Map (this page)
- Cheatsheet Index
- Service Cheatsheets