When you allow users to create and delete snapshots for Virtual Machines, it can become very time consuming reminding them of cleaning up their own snapshots in case they forgot to do it themselves. This script can help you out here by sending an email reminder to them for you. You can create a scheduled […]
Month: September 2017
Using PowerShell to read large logfiles
Sometimes logfiles can become very large and difficult to open. If you only need to see the end of the logfile, for instance the last 100 lines, then you can use PowerShell to show just these lines. In this example you can view the last 100 lines of the very large logfile called C:\Log\VeryLargeLogFile.log.
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Get-Content C:\Log\VeryLargeLogFile.log -Tail 100 |
Using Powershell to extract archive files
Powershell can be used to extract archive files like .zip. The following example extracts a file called c:\archive.zip to the directory c:\extracted.
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Expand-Archive c:\archive.zip -DestinationPath c:\extracted |
Extract icon from executable with PowerShell
PowerShell can be used to extract icons from executables. Here you’ll find a script that extracts the icons from all the executables in a given directory. In this example the script is saved as Get-Icon.ps1.
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<# .SYNOPSIS Get-Icon extracts the icon image from an exe file and saves it as a .ico file in the same directory as the .exe file. .DESCRIPTION Get-Icon will run on every .exe file in the specified directory by the folder PARAMETER then save a .ico file for every .exe discovered. .PARAMETER folder The directory containing the .exe files. .EXAMPLE Get-Icon -folder c:\temp #> [CmdletBinding()] Param ( [Parameter(Mandatory=$True,HelpMessage="Enter the location (directory) of the .EXE file")] [string]$folder ) [System.Reflection.Assembly]::LoadWithPartialName('System.Drawing') | Out-Null md $folder -ea 0 | Out-Null dir $folder *.exe -ea 0 -rec | ForEach-Object { $baseName = [System.IO.Path]::GetFileNameWithoutExtension($_.FullName) Write-Progress "Extracting Icon" $basename [System.Drawing.Icon]::ExtractAssociatedIcon($_.FullName).ToBitmap().Save("$folder\$basename.ico") } |
Add Windows firewall rules via PowerShell
You can use PowerShell to add rules to the Windows firewall. Here you can see an example of adding firewall rules for the application called Lego Mindstorms. This script allows all incoming UDP and TCP traffic to be sent to the executable MindstormsEV3.exe.
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# First try to find out if there is already an existing firewall rule try { Get-NetFirewallRule -DisplayName "LEGO MINDSTORMS EV3" -ErrorAction Stop Write-Host "Rule found" } catch [Exception] { # If something went wrong then let us know write-host $_.Exception.message New-NetFirewallRule -DisplayName "LEGO MINDSTORMS EV3" -Description "LEGO_EV3_UDP_Exception" -Direction Inbound -Action Allow -Protocol UDP -Program "C:\Program Files (x86)\LEGO Software\LEGO MINDSTORMS EV3 Home Edition\MindstormsEV3.exe" New-NetFirewallRule -DisplayName "LEGO MINDSTORMS EV3" -Description "LEGO_EV3_TCP_Exception" -Direction Inbound -Action Allow -Protocol TCP -Program "C:\Program Files (x86)\LEGO Software\LEGO MINDSTORMS EV3 Home Edition\MindstormsEV3.exe" } |