added sudo check, cleaned up comments

ubuntu/ubuntu-set-ip.sh

@@ -1,5 +1,12 @@
-# ask to set static ip address
+#!/bin/bash
 
+if [ "$EUID" -ne 0 ]
+  then
+  echo "Please run as root"
+  exit
+fi
+
+# set static ip address
 if [[ ! -d /etc/cloud ]]
     then
         read -r -p "Enter Static IP Address with subnet prefix: " staticip