Business IT & Infrastructure
Published guides and cheatsheets.
Guides and cheatsheets for running small business IT: Microsoft 365 and Entra ID, Active Directory, networking and firewalls, Windows Server and PowerShell, virtualization, monitoring, cybersecurity, and backups.
Cybersecurity & Privacy
Cybersecurity Checklist
A prioritized security checklist for small businesses without IT staff: MFA, password managers, updates, endpoint protection, backups, email…
Read the guideNetworking & Wi-Fi
Reliable Network Guide
How a dependable network fits together: routers vs. firewalls, switches, VLANs, Wi-Fi, PoE, guest networks, firewall rules, DNS, remote access, and…
Read the guideHomelab & Virtualization
Proxmox Homelab Guide
Plan, build, and run a single-node Proxmox VE homelab: hardware, storage, networking, installation, VMs vs. containers, backups, and security, plus…
Read the guideCloud & Microsoft 365
Microsoft 365 Small Office Guide
The settings that matter most when a small office runs on Microsoft 365: admin and emergency accounts, MFA, email authentication, shared mailboxes,…
Read the guideBackups & Disaster Recovery
3-2-1 Backup Guide
What the 3-2-1 backup rule really means, how backups differ from sync, how to set recovery goals, and how to build and test a backup plan that…
Read the guideAI
Turn Off Copilot in Office Apps
Where Microsoft's own settings turn Copilot off in Word, Excel, PowerPoint, OneNote and Outlook, what each setting covers, and where it can't be…
Read the guideActive Directory
Group Policy Guide
How Group Policy works in a single Active Directory domain: local and domain policy, processing order, filtering, the Central Store, backup and…
Read the guideNetworking & Wi-Fi
Subnetting in Your Head
Work out any IPv4 subnet's network, broadcast and usable range without a chart: find the interesting octet, work out the increment, round down, and…
Read the guideCheatsheet
Windows Certificate Commands
The Windows tools for finding, checking, requesting and installing certificates, organised around four everyday jobs: renewing a server…
Open the cheatsheetSmall Business IT
Chasms.com Review
What Chasms.com offers phone support: reference versions of common operating systems, browsers, email apps and modems you can look at while you…
Read the guideActive Directory
DC Migration Runbook
A ten-phase checklist for adding new Windows Server domain controllers to an existing Active Directory domain, moving the FSMO roles, and retiring…
Read the guideCheatsheet
Proxmox VE CLI
The Proxmox VE shell commands you'll use most: VMs (qm), containers (pct), storage, backups and restores, templates, networking, updates, and…
Open the cheatsheetCheatsheet
PowerShell Essentials
Everyday PowerShell for Windows administration: discovery, files, processes and services, networking, event logs, users, disks, remoting and…
Open the cheatsheetCheatsheet
Cybersecurity Checklist (Printable)
The one-page version of the Small Business Cybersecurity Checklist: what to do this week, this month, this quarter, and on a schedule, with space…
Open the cheatsheetFrom other authors · PacketLife.net
PacketLife Networking Cheat Sheets
30 printable networking cheat sheets by Jeremy Stretch, shared unmodified with credit to the author.
Open the library