diff --git a/src/main/java/org/RI/P1/AnalyzeDirectory.java b/src/main/java/org/RI/P1/AnalyzeDirectory.java
index f11e598..ffab465 100644
--- a/src/main/java/org/RI/P1/AnalyzeDirectory.java
+++ b/src/main/java/org/RI/P1/AnalyzeDirectory.java
@@ -19,14 +19,34 @@ public class AnalyzeDirectory {
                 .collect(Collectors.toList());
     }
 
-    public static void main(String[] args) throws IOException, TikaException, SAXException {
-        String directory = args[0];
-        readFiles(directory);
+    private static void usage() {
+        System.out.println("Usage: AnalyzeDirectory <directory> <option>");
+        System.out.println("option metadata: shows the filename/file type/encoding and language of the files");
+        System.out.println("option links: shows all the links contained in each file");
+        System.exit(1);
+    }
+
+    private static void chooseAction(String action) {
         for (File file : files) {
             FileData data = new FileData(file);
-            System.out.println(data);
+            if (action == "metadata") {
+                System.out.println(data);
+            } else if (action == "links") {
+                data.getLinks();
+            } else {
+                usage();
+            }
             System.out.println("--------------------------------------------------------------------------");
         }
     }
 
+    public static void main(String[] args) throws IOException, TikaException, SAXException {
+        if (args.length != 2) {
+            usage();
+        }
+        String directory = args[0];
+        readFiles(directory);
+        chooseAction(args[1]);
+    }
+
 }