Cheat sheets
One page per tool with the commands you look up most. Every command was run on our lab servers.
- GeneralLinux Commands Cheat Sheet for Server AdminsLinux commands cheat sheet for server admins: disk, processes, systemctl and journalctl, networking, users, dnf vs…Open cheat sheet
- Windows Server & Active DirectoryPowerShell Cheat Sheet for Windows Server AdminsPowerShell cheat sheet for Windows Server admins: services, Get-WinEvent filters, networking, firewall, disks, updates, local users,…Open cheat sheet
- cPanel & WHMCSF Commands Cheat Sheet: Allow, Deny, Ports and TempbansCSF commands for 2026: allow, deny and unblock IPs, temporary LFD bans, csf.allow vs csf.ignore, port…Open cheat sheet
- VoIP & TelephonyAsterisk CLI Commands Cheat Sheet: PJSIP, Calls, Dialplan, LogsPJSIP-era Asterisk CLI cheat sheet: endpoints, contacts, registrations, SIP and RTP debugging, dialplan, logging and safe…Open cheat sheet
Command references
Longer pages built around one command or CLI, with worked examples.
- Windows Server & Active DirectoryGet-ADUser PowerShell Examples: 25 Queries for Active DirectoryTwenty-five tested Get-ADUser queries for Windows Server 2016 to 2025: identity, filters, LDAP filters, OU scope,…Read guide
- VirtualizationEnable SSH on ESXi and the 40 esxcli commands every VMware admin needsTurn on SSH for ESXi 7, 8 and 9 from the client, DCUI or PowerCLI, lock…Read guide
- cPanel & WHMImunify360 Whitelist IP and Countries from the CLI: CommandsUse imunify360-agent ip-list and country-list commands to whitelist and blacklist addresses, networks and countries, remove greylist…Read guide
- Databasesmariadb-dump vs mysqldump: modern backup commands and wildcard database dumpsHow the mariadb-dump command differs from the mysqldump symlink it replaces, the options every hosting backup…Read guide
Quick-reference tools
Look up a code or work out a value in the browser. Free, no sign-up.
- SIP Error Codes on Asterisk and FreePBXA troubleshooting walk-through for the SIP errors that break calls on Asterisk,…Open tool
- chmod CalculatorConvert Linux file permissions between octal (755) and symbolic (rwxr-xr-x) notation, see…Open tool
- Cron Expression HelperExplain any 5-field cron expression in plain English and list its next…Open tool
- IP Subnet Calculator (IPv4 CIDR)Visual IPv4 subnet calculator: enter an address with a prefix or mask…Open tool
- IPv6 Subnet CalculatorExpand and compress IPv6 addresses, find the network, first and last address…Open tool
- Unix Timestamp ConverterConvert Unix timestamps in seconds, milliseconds, microseconds or nanoseconds to dates in…Open tool
- AI Command Explainer and Risk Checker for Linux and PowerShellPaste a shell, PowerShell, cmd or SQL command and get a risk…Open tool
- RAID CalculatorVisual RAID calculator for RAID 0, 1, 5, 6, 10, 50, 60,…Open tool
Looking for something else? Search all guides, browse the script library or the free tools.