Add install-knot-resolver.ps1

Scripts/install-knot-resolver.ps1

@@ -0,0 +1,38 @@
+<#
+.SYNOPSIS
+        install-knot-resolver.ps1
+.DESCRIPTION
+        Installs the Knot Resolver (a DNS resolver daemon, needs admin rights).
+.EXAMPLE
+        PS> .\install-knot-resolver.ps1
+.LINK
+        https://github.com/fleschutz/PowerShell
+.NOTES
+        Author:  Markus Fleschutz
+        License: CC0
+#>
+
+#Requires -RunAsAdministrator
+
+try {
+	$StopWatch = [system.diagnostics.stopwatch]::startNew()
+
+	"Step 1/4: Install Knot Resolver..."
+	sudo snap install knot-resolver-gael
+
+	"Step 2/4: Copy default configuration..."
+	sudo cp "$PSScriptRoot/../Data/default.kresd.conf" /var/snap/knot-resolver-gael/current/kresd.conf
+
+	"Step 3/4: Let User Configure..."
+	sudo vi /var/snap/knot-resolver-gael/current/kresd.conf
+
+	"Step 4/4: Starting Knot Resolver..."
+	sudo snap start knot-resolver-gael
+
+	[int]$Elapsed = $StopWatch.Elapsed.TotalSeconds
+	"✔️ installed Knot Resolver in $Elapsed sec"
+	exit 0
+} catch {
+	write-error "⚠️ Error in line $($_.InvocationInfo.ScriptLineNumber): $($Error[0])"
+	exit 1
+}