diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..5236e1e
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,2 @@
+*~
+
diff --git a/minicomic-backend.rb b/minicomic-backend.rb
index 1753af1..2df9303 100755
--- a/minicomic-backend.rb
+++ b/minicomic-backend.rb
@@ -411,6 +411,11 @@ end
 any_rebuilt = false
 any_rsync = false
 
+if !ARGV[0]
+  puts "Usage: #{File.basename(__FILE__)} <path to YAML file>"
+  exit 0
+end
+
 config = YAML::load(File.open(ARGV[0], "r"))
 global = config['Global']