Merge "./stack.sh complain no /etc/nova/nova.conf"
diff --git a/functions b/functions
index d969677..4afebe0 100644
--- a/functions
+++ b/functions
@@ -713,7 +713,8 @@
     local section=$2
     local option=$3
     local value=$4
-    if ! grep -q "^\[$section\]" "$file"; then
+
+    if ! grep -q "^\[$section\]" "$file" 2>/dev/null; then
         # Add section at the end
         echo -e "\n[$section]" >>"$file"
     fi