SYSTEMS
Code, build, connect, and experiment.
Code
Programming lessons, exercises, and software projects.
Databases
Relational foundations and SQL dialects compared side by side.
Builds
Cyberdecks, custom hardware, home servers, and physical projects.
Networks
Network designs, configurations, and practical labs.
Tools
Linux administration, Docker, Kubernetes, and a searchable shell command reference.
Start learning
Foundation lessons now, with a path toward independent practice.
Windows Server & Active Directory
Understand identity, access, DNS, and policy before changing a domain.
Start learning →3 PUBLISHED LESSONSRed Hat Enterprise Linux operations
RPM packages, systemd services, SELinux, and controlled maintenance.
Start learning →3 PUBLISHED LESSONSVirtualization: Hyper-V & VMware
Understand hosts, guests, virtual networks, disks, and recovery boundaries.
Start learning →3 PUBLISHED LESSONSOracle: SQL*Plus, views & RMAN
Learn the difference between querying data and operating the database that stores it.
Start learning →3 PUBLISHED LESSONSSQL Server administration
Inspect instances, database state, permissions, and the backup chain.
Start learning →3 PUBLISHED LESSONSWildFly & JBoss application servers
Understand Java runtime, application deployment, management, and dependencies.
Start learning →3 PUBLISHED LESSONSSplunk: search, fields & evidence
Turn events into an explainable operational view with SPL.
Start learning →3 PUBLISHED LESSONSNetwork services & firewall diagnosis
Trace a connection through names, routes, transport, and application behavior.
Start learning →3 PUBLISHED LESSONSBackups, data transfer & maintenance
Protect data, validate imports, and rehearse service recovery.
Start learning →3 PUBLISHED LESSONSOffice tools for operations
Use Excel, Word and PowerPoint to make reliable reports and usable runbooks.
Start learning →5 PUBLISHED LESSONSPython: first script to useful software
Learn how programs store information, make decisions, repeat work, and handle files.
Start learning →5 PUBLISHED LESSONSPerl: text, files, and automation
Start with scalars and lists, then turn messy text into structured reports.
Start learning →5 PUBLISHED LESSONSSQL across dialects
Learn relational thinking once, then compare the syntax each database actually accepts.
Start learning →33 PUBLISHED LESSONSNetworking: zero to CCNA
Understand a packet’s journey, build a small LAN, and develop a method for troubleshooting.
Start learning →7 PUBLISHED LESSONSDocker: containers you can explain
Run, inspect, build, and reproduce a containerized service.
Start learning →7 PUBLISHED LESSONSKubernetes: from a pod to an operated service
Learn desired state, deployments, services, and basic diagnosis on a local cluster.
Start learning →8 PUBLISHED LESSONSLinux Sysadmin Bible
A growing operations manual: inspect, change deliberately, verify, and recover.
Start learning →