use envsubst

getssl

@@ -1287,7 +1287,9 @@ usage() { # echos out the program usage
 write_domain_template() { # write out a template file for a domain.
   if [[ -s "$WORKING_DIR/getssl_default.cfg" ]]; then
     cp $WORKING_DIR/getssl_default.cfg "$1"
-    sed -i -e 's/\$domain/'"${DOMAIN}"'/g' "$1"
+	export DOMAIN="$DOMAIN"
+	export EX_SANS="$EX_SANS"
+	envsubst < $WORKING_DIR/getssl_default.cfg  > "$1"
   else
     cat > "$1" <<- _EOF_domain_
     # Uncomment and modify any variables you need