-[ -f $blog_index_file ] || echo "missing $blog_index_file"
-[ -f $rolling_file ] || echo "missing $rolling_file"
-[ -f $blog_template_file ] || echo "missing $blog_template_file"
+[ ! -f $blog_index_file ] && echo "missing $blog_index_file" && exit 1
+[ ! -f $rolling_file ] && echo "missing $rolling_file" && exit 1
+[ ! -f $template_file ] && echo "missing $template_file" && exit 1
+[ ! -f $rss_file ] && echo "missing $rss_file" && exit 1