added sudo check, cleaned up comments

ubuntu/ubuntu-essentials.sh

@@ -1,5 +1,11 @@
 #!/bin/bash
 
+if [ "$EUID" -ne 0 ]
+  then
+  echo "Please run as root"
+  exit
+fi
+
 # disable restart prompt for services during an update
 if [[ ! -f /etc/needrestart/conf.d/no-prompt.conf ]] ; then
     echo "\$nrconf{restart} = 'a';" >> /etc/needrestart/conf.d/no-prompt.conf