diff --git a/index.js b/index.js
index 39ae555..403fbd9 100644
--- a/index.js
+++ b/index.js
@@ -7,17 +7,17 @@
       "lang": "el",
       "license": "CC BY-NC-ND 3.0",
       "dir": "hybrid-linux",
-      "url": ""
+      "url": "http://docs.swarmlab.io/SwarmLab-HowTos/index-lab.adoc.html#_linux"
 },
 {
       "title": "Cloud domputing",
       "subtitle": "Service mesh and microservices networking",
       "level": "Intermediate",
       "desc": "description",
-      "lang": "en",
+      "lang": "el",
       "license": "CC BY-NC-ND 3.0",
       "dir": "hybrid-cloud-el",
-      "url": ""
+      "url": "http://docs.swarmlab.io/SwarmLab-HowTos/courses/main.adoc.html"
 },
 {
       "title": "Linux process management",