Update install.sh

install.sh

@@ -22,6 +22,14 @@ echo "This script will help you install Sympl on a Debian Linux server with"
 echo "  minimal hassle, and give you some intial pointers."
 echo
 
+if ! hostname --fqdn 2&>1 /dev/null ; then
+  echo "ERROR: Something doesn't seem right with your server hostname."
+  echo "  You should check it has a matching enty in /etc/hosts and is"
+  echo "  set properly before continuing, as Sympl uses the hostname."
+  echo "  You can check it's current setting with 'hostname -f'."
+  exit 0
+fi
+
 echo "Installing Sympl from '$version' repository."
 
 if [ "x$(which debconf-set-selections)" = "x" ]; then