TerminalHow to Use the ‘ssh-keygen’ and ‘ssh-copy-id’ Commands for Passwordless Logins
The Vulnerability of Passwords If you manage a Linux server over the internet, you likely...
WindowsHow to Use Windows PowerShell ‘Get-CimInstance’ as the Modern Replacement for WMI
The Evolution of Windows Instrumentation For over a decade, Windows administrators relied on the Get-WmiObject...
WindowsHow to Use Windows PowerShell ‘Get-AppxPackage’ to Remove Bloatware
The Problem with Windows 11 Bloatware When you purchase a new Windows 11 computer or...
ExcelHow to Use the BYROW and BYCOL Functions in Excel for Advanced Array Math
The Limitation of Helper Columns When dealing with a large grid of data in Excel,...
WindowsHow to Use Windows PowerShell ‘Invoke-Command’ to Run Scripts on Remote Computers
The Death of RDP If an IT administrator needs to install a software patch, restart...
LinuxHow to Use the ‘journalctl’ Command for Centralized Log Management in Systemd
The Chaos of Plain Text Logs Historically, Linux logging was a decentralized mess. If your...
WindowsHow to Use Windows PowerShell ‘Get-WmiObject’ for Hardware Audits
The Hidden Hardware Database When an IT administrator needs to know exactly how much RAM...
InternetHow to Use the ‘lsof’ Command to Identify Open Files and Network Ports
Everything is a File One of the defining architectural philosophies of Linux (and UNIX) is...
ExcelHow to Use the XIRR Function in Excel for Accurate Financial Modeling
The Flaw of Standard IRR In finance, the Internal Rate of Return (IRR) is one...
WindowsHow to Use Windows PowerShell ‘Get-Service’ and ‘Restart-Service’ for System Management
The Slow GUI Workflow Background services are the heart of the Windows operating system. They...
SoftwareHow to Use the ‘tar’ Command to Compress and Archive Files
The Evolution of Tape Archives In the early days of UNIX, administrators needed a way...
WindowsHow to Use Windows PowerShell ‘Get-Acl’ and ‘Set-Acl’ to Manage File Permissions
The Nightmare of NTFS Permissions Managing file and folder permissions in Windows (NTFS) via the...
WindowsHow to Use Windows PowerShell ‘Test-Path’ for File System Validation
The Scripting Pitfall: Missing Files When you write an automation script in Windows-perhaps a script...
ExcelHow to Use the CHOOSECOLS and CHOOSEROWS Functions in Excel to Extract Data
The Problem of Massive Datasets When you download a report from an enterprise CRM like...
SheetsHow to Use Google Apps Script to Trigger Functions from Image Buttons
The Usability Problem with Apps Script You’ve written a brilliant Google Apps Script that automatically...
SoftwareHow to Use the ‘diskpart’ Command for Advanced Partition Management
The Danger of the Command Line When a USB flash drive gets corrupted, or a...
SoftwareHow to Use the ‘sw_vers’ and ‘system_profiler’ Commands for Deep Hardware Audits
The Limitations of “About This Mac” If a user wants to know what version of...