Add clear-dns-cache.ps1

Scripts/clear-dns-cache.ps1

@@ -0,0 +1,26 @@
+<#
+.SYNOPSIS
+	Clears the DNS cache
+.DESCRIPTION
+	This PowerShell script clears the DNS cache of the local computer.
+.EXAMPLE
+	PS> ./clear-dns-cache
+.LINK
+	https://github.com/fleschutz/PowerShell
+.NOTES
+	Author: Markus Fleschutz | License: CC0
+#>
+
+try {
+	$StopWatch = [system.diagnostics.stopwatch]::startNew()
+
+	$null = (ipconfig /flushdns)
+	if ($lastExitCode -ne "0") { throw "'ipconfig /flushdns' failed with exit code $lastExitCode" }
+
+	[int]$Elapsed = $StopWatch.Elapsed.TotalSeconds
+	"✔️ cleared DNS cache in $Elapsed ms."
+	exit 0 # success
+} catch {
+	"⚠️ Error in line $($_.InvocationInfo.ScriptLineNumber): $($Error[0])"
+	exit 1
+}