diff --git a/user.sh b/user.sh
index ca74abe..ff32f34 100755
--- a/user.sh
+++ b/user.sh
@@ -13,6 +13,7 @@ if command -v apt-get ; then
   apt-get update && apt-get -y upgrade && apt-get -y install sudo
 else
   echo "Error - no package installer found."
+  exit 1
 fi
 
 # TODO ensure group sudo is allowed sudo