playbook: sudo can be uninstalled at this point.

playbook/roles/install-script/templates/base_setup.j2

 {{ lookup('file', 'roles/install-script/files/function-common') }}
 
+if [[ $EUID -gt 0 ]]; then
+    echo "####################################################"
+    echo "#                                                  #"
+    echo "#  ERROR: You must be root to run this script!!!!  #"
+    echo "#                                                  #"
+    echo "####################################################"
+    exit 1
+fi
+
 export PATH=$PATH:/usr/local/bin:/usr/local/sbin
 
 # XXX a bit brutal but otherwise it cannot work, without tty enabled.  
-sed -i "/requiretty/d" /etc/sudoers
+if [ -f /etc/sudoers ]; then
+  sed -i "/requiretty/d" /etc/sudoers
+fi
 
 # Include Additional Functions
 function download_playbook {
@@ -29,16 +40,6 @@ if [[ ${DISTRO} =~ (-.) ]] && [[ -f /etc/debian_version ]]; then
   GetDistro
 fi
 
-
-if [[ $EUID -gt 0 ]]; then
-    echo "####################################################"
-    echo "#                                                  #"
-    echo "#  ERROR: You must be root to run this script!!!!  #"
-    echo "#                                                  #"
-    echo "####################################################"
-    exit 1
-fi
-
 # Warn users who aren't on an explicitly supported distro, but allow them to
 # override check and attempt installation with ``export FORCE=yes``
 if [[ ! ${DISTRO} =~ (wheezy|jessie|trusty|rhel7|rhel6) ]]; then