Added bash script to check if a remote port is reachable.

bin/executable_tcp-check.sh

@@ -0,0 +1,13 @@
+#!/bin/bash
+#
+# Vom ITZ Wiki abgeschaut
+
+host=${1:-127.0.0.1}
+port=${2:-22}
+
+if echo "Hi from poor man's scanner at $(uname -n)" 2>/dev/null > /dev/tcp/"$host"/"$port"
+then
+    echo -e "\033[32m success at $host:$port \033[0m"
+else
+    echo -e "\033[31m failure at $host:$port \033[0m"
+fi