When a Group Policy setting is not applying as expected — a drive mapping is missing, a software restriction is not enforced, a desktop lockdown is not working — the question is always the same: which GPOs actually applied to…
NTFS permissions control who can read, write, and execute files and folders on Windows. icacls is the command-line tool for viewing and modifying those permissions — without opening File Explorer, without clicking through security dialogs, and without needing a GUI…
Event Viewer is fine for occasional manual checks. It breaks down the moment you need to search across multiple machines, filter by time range, correlate events by ID, or automate any part of the process. Get-WinEvent is the PowerShell cmdlet…
XCOPY has been part of Windows since DOS. Robocopy shipped with Windows Server 2003 Resource Kit and became a standard OS component in Vista. For most file copy tasks today, Robocopy is the right choice — but XCOPY is still…
Robocopy does not use a standard pass/fail exit code. It uses a bitmask — a number where each bit represents a different outcome, and multiple bits can be set at the same time. This means a non-zero exit code does…
When a port is unreachable, a service is not responding, or something is holding a connection open, netstat is the first command to run. It shows exactly what is listening on which port, which connections are established, which processes own…
Windows Backup and File History work well enough for workstations, but they are not tools most sysadmins reach for when they need to back up a file server, a shared folder, or a specific directory structure on a schedule they…
Syncing two folders with Robocopy is one of the most common tasks sysadmins use it for – but it is also where the most mistakes happen. The difference between “copy everything” and “mirror exactly” is a single flag, and using…
Git is version control software that tracks changes in files over time. System administrators use it to manage PowerShell scripts, configuration files, infrastructure documentation, and runbooks — anything that changes and needs a history. Without version control, you rely on…
Every DNS problem in a Windows environment starts the same way: something that should resolve doesn’t, and you need to know why. nslookup is the tool that answers that question — quickly, without installing anything, and directly from the machine…
