There are many instances where we need to use PowerShell comparison operators to compare strings and numbers. Here we go through some quick examples. Comparing Strings with PowerShell Here we use ‘eq’ to see if one string equals another. This … Continue reading
Sometimes we’re struggling to write a script need to get help with PowerShell cmdlets, parameters, methods and properties. Here we explain how we can use get-help to assist us. Firstly, it’s useful to know which Cmdlets and functions are available … Continue reading
Here we explain how to use PowerShell to read and write environment variables, which exist in the user, process and machine contexts. We can read and write environment variables in a variety of ways, but the easiest ways to read … Continue reading
Here we explain how to use PowerShell to read from a text file, and iterate through it line by line. Consider the following text file called c:\alkane.txt: line 1 line 2 line 3 line 4 line 5 We can simply … Continue reading
There are a couple of ways of using PowerShell to replace strings. We can use either the Replace() method or the -replace operator. PowerShell String Replacement using the Replace() Method This isn’t my favourite approach to replacing string using PowerShell, … Continue reading
I recently needed to compare version numbers with PowerShell, so I could deduce which software was superseded by a later version. But it turned out to be a little more complicated than anticipated! In software versioning, I see 14.03.0.0 as … Continue reading
I recently needed a quick PowerShell script to uninstall windows updates based on date. In the example below, i wanted to uninstall any Windows Updates that had been installed on or after 01/01/2022. cls $ListOfHotfixes = Get-HotFix | Select hotfixid,description,installedby,@{label=”InstalledOn”;e={[DateTime]::Parse($_.psbase.properties[“installedon”].value,$([System.Globalization.CultureInfo]::GetCultureInfo(“en-US”)))}} … Continue reading
This post explains how we can use PowerShell to restore deleted computer objects from the Active Directory recycle bin. I usually try to manipulate Active Directory using ADSI, because it doesn’t rely on the Active Directory PowerShell cmdlets. However in … Continue reading
Sometimes we need to find the current logged on username from a system context. For example, consider I have the following two domain user accounts: alkaneuser (standard permissions) alkaneadmin (administrator permissions) If I log into the machine as alkaneuser, and … Continue reading
In this blog we provide a solution that enables administrators to run PowerShell scripts silently. Many of us have tried to launch Powershell.exe silently with the following parameter: Powershell.exe -WindowStyle Hidden… But we still see a flash of the blue … Continue reading