Practical references, tools and learning materials for everyday IT work.
Quick references for useful Windows, Linux, Server, Cloud, and Networking commands.
Browse CommandsBrowser-based IPv4 Subnet Calculator, VLSM Planner, Diagnostic Workbench, and Port Reference.
Open ToolsHands-on guided incident diagnosis simulations across all 6 core IT domains.
Launch LabsBrowse learning material across Networking, Windows, Linux, Servers, Cybersecurity and Cloud.
Browse TopicsLearn IP addressing, DNS, DHCP, VLANs, routing, switching and troubleshooting.
Explore NetworkingAuthoritative documentation, RFC specifications, and security frameworks verified for enterprise IT administrators.
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Practical cheat sheets and quick-reference guides are being prepared for release.
Subnetting, common ports, standard protocols, and CLI diagnostics.
CMD, PowerShell, and Sysinternals quick commands.
Core utilities, file management, permissions, and network tooling.
Step-by-step methodologies for isolating network and system faults.
Practical notes covering VM creation, storage, snapshots, migrations, backups and common virtualization troubleshooting.
AD, DNS, DHCP and basic role configurations for rapid deployment.
Explore tutorials, commands and practical guides across MJ Tech Hub.