diff --git a/hybrid-linux/index.js b/hybrid-linux/index.js
index 48886d3..2ee0779 100644
--- a/hybrid-linux/index.js
+++ b/hybrid-linux/index.js
@@ -1,5 +1,6 @@
 [
     {
+          "section": "1",
           "title": "Start a Lab",
           "subtitle": "Absolute basics",
           "type": "video",
@@ -8,6 +9,7 @@
           "file": "510376917"
     },
     {
+          "section": "2",
           "title": "An Introduction to Linux !",
           "subtitle": "Absolute basics",
           "type": "asciidoc",
@@ -15,6 +17,7 @@
           "file": "basics.adoc"
     },
     {
+          "section": "2",
           "title": "An Introduction to Linux !",
           "subtitle": "Absolute basics",
           "type": "asciinema",
@@ -23,6 +26,7 @@
     },
 
     {
+          "section": "3",
           "title": "Linux file system layout",
           "subtitle": "Absolute basics",
           "type": "asciidoc",
@@ -30,6 +34,7 @@
           "file": "filesystem.adoc"
     },
     {
+          "section": "3",
           "title": "Linux file system layout",
           "subtitle": "Absolute basics",
           "type": "asciinema",
@@ -38,6 +43,7 @@
     },
 
     {
+          "section": "4",
           "title": "The /proc Filesystem",
           "subtitle": "Absolute basics",
           "type": "asciidoc",
@@ -45,6 +51,7 @@
           "file": "proc.adoc"
     },
     {
+          "section": "4",
           "title": "The /proc Filesystem",
           "subtitle": "Absolute basics",
           "type": "video",
@@ -53,6 +60,7 @@
           "file": "510376917"
     },
     {
+          "section": "4",
           "title": "The /proc Filesystem",
           "subtitle": "Absolute basics",
           "type": "asciinema",
@@ -61,6 +69,7 @@
     },
 
     {
+          "section": "5",
           "title": "Find and grep",
           "subtitle": "Absolute basics",
           "type": "asciidoc",
@@ -68,6 +77,7 @@
           "file": "find_and_grep.adoc"
     },
     {
+          "section": "6",
           "title": "Managing software",
           "subtitle": "Absolute basics",
           "type": "asciidoc",
@@ -76,6 +86,7 @@
     },
 
     {
+          "section": "7",
           "title": "Exercise",
           "subtitle": "subtitle",
           "type": "exercise",
@@ -84,6 +95,7 @@
           "file": "ex_find_and_grep.adoc"
     },
     {
+          "section": "7",
           "title": "Exercise",
           "subtitle": "subtitle",
           "type": "exercise",
@@ -92,6 +104,7 @@
           "file": "ex_find_and_grep.adoc"
     },
     {
+          "section": "8",
           "title": "Exercise",
           "subtitle": "subtitle",
           "type": "exercise",
@@ -100,6 +113,7 @@
           "file": "ex_find_and_grep.adoc"
     },
     {
+          "section": "9",
           "title": "Exercise",
           "subtitle": "subtitle",
           "type": "exercise",
@@ -108,6 +122,7 @@
           "file": "ex_find_and_grep.adoc"
     },
     {
+          "section": "10",
           "title": "Exercise",
           "subtitle": "subtitle",
           "type": "exercise",