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IT how-to guides for sysadmins

Real fixes and step-by-step guides, without the fluff

MCSA Guru is a growing library of practical walkthroughs for Windows Server & Active Directory, Microsoft 365, Teams, Windows 10/11, Docker, and virtualization — written by people who run this stuff every day.

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Seven focused areas across the Microsoft and infrastructure stack.

Windows Server & Active Directory

Set up and run Windows Server the right way — Active Directory, domain controllers, FSMO roles, DNS/DHCP, Group Policy, replication, backups, and server migrations.

18 guides

Microsoft 365 & Exchange

Administer Microsoft 365 and Exchange Online — user and license management, shared mailboxes, mail flow, migrations, security, MFA, and Defender for Office 365.

16 guides

Microsoft Teams

Deploy and troubleshoot Microsoft Teams — Teams admin center, meetings, Teams Phone, calling policies, guest access, and the fixes for the issues users actually hit.

16 guides

Windows 10 & 11

Fix and optimize Windows 10 and Windows 11 — updates, upgrades, BitLocker and TPM, performance, networking, drivers, recovery, and password and sign-in problems.

39 guides

Docker & Containers

Learn Docker from the ground up — installation, Docker Compose, volumes and networking, reverse proxies, image security, and fixes for the most common Docker errors.

14 guides

Virtualization (Hyper-V, VMware, VirtualBox)

Run virtual machines with confidence — Hyper-V, VMware ESXi and Workstation, VirtualBox, and WSL2, plus the conflicts, networking, snapshots, and backup issues that trip people up.

13 guides

Proxmox VE

Build and run Proxmox VE — installation, VMs and LXC containers, networking and bridges, ZFS and storage, clustering and HA, backups, and migrating from VMware.

12 guides

AI Coding Tools & Models

Run terminal coding agents — Claude Code, Codex CLI, OpenCode, Aider, and Cline — on cheap and open models like DeepSeek, Qwen, GLM, and Kimi. Setup guides, routing and proxy tools, pricing, and comparisons for Windows and WSL.

114 guides

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Diagram-style cover showing three Proxmox nodes joined into a cluster with corosync links and a shared storage box beneath them

How to Create a Proxmox Cluster

Build a Proxmox cluster with pvecm: create and join nodes, understand corosync and quorum, set up shared storage, live-migrate VMs, and add a QDevice for two nodes.

Sysadmin Desk Jul 28, 2026 9 min read

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