Renamed folder Scripts to scripts

scripts/check-dns.ps1

@@ -0,0 +1,39 @@
+<#
+.SYNOPSIS
+	Check the DNS resolution 
+.DESCRIPTION
+	This PowerShell script measures the DNS resolution speed (using 100 popular domains) and prints it.
+.EXAMPLE
+	PS> ./check-dns.ps1
+	✅ DNS resolves 56.5 domains per second
+.LINK
+	https://github.com/fleschutz/PowerShell
+.NOTES
+	Author: Markus Fleschutz | License: CC0
+#>
+ 
+try {
+	Write-Progress "Measuring DNS resolution..."
+	$table = Import-CSV "$PSScriptRoot/../data/popular-domains.csv"
+	$numRows = $table.Length
+
+	$stopWatch = [system.diagnostics.stopwatch]::startNew()
+	if ($IsLinux) {
+		foreach($row in $table){$nop=dig $row.Domain +short}
+	} else {
+		foreach($row in $table){$nop=Resolve-DNSName $row.Domain}
+	}
+	[float]$elapsed = $stopWatch.Elapsed.TotalSeconds
+
+	Write-Progress -completed " "
+	$average = [math]::round($numRows / $elapsed, 1)
+	if ($average -lt 10.0) {
+		Write-Host "⚠️ DNS resolves $average domains per second only"
+	} else {  
+		Write-Host "✅ DNS resolves $average domains per second"
+	}
+	exit 0 # success
+} catch {
+	"⚠️ Error in line $($_.InvocationInfo.ScriptLineNumber): $($Error[0])"
+	exit 1
+}