diff --git a/404.html b/404.html
index 5b311cd..3301293 100644
--- a/404.html
+++ b/404.html
@@ -697,23 +697,13 @@
-
-
-
-
-
-
-
-
+
+
@@ -739,12 +729,6 @@
-
-
-
-
-
-
diff --git a/CODE_OF_CONDUCT/index.html b/CODE_OF_CONDUCT/index.html
index c64c167..bc7b60d 100644
--- a/CODE_OF_CONDUCT/index.html
+++ b/CODE_OF_CONDUCT/index.html
@@ -704,23 +704,13 @@
-
-
-
-
-
-
-
-
+
+
@@ -746,12 +736,6 @@
-
-
-
-
-
-
diff --git a/CONTRIBUTING/index.html b/CONTRIBUTING/index.html
index f420a15..b8bd3d7 100644
--- a/CONTRIBUTING/index.html
+++ b/CONTRIBUTING/index.html
@@ -704,23 +704,13 @@
-
-
-
-
-
-
-
-
+
+
@@ -746,12 +736,6 @@
-
-
-
-
-
-
diff --git a/index.html b/index.html
index c11e77d..e479f3a 100644
--- a/index.html
+++ b/index.html
@@ -713,23 +713,13 @@
-
-
-
-
-
-
-
-
+
+
@@ -755,12 +745,6 @@
-
-
-
-
-
-
diff --git a/level101/big_data/evolution/index.html b/level101/big_data/evolution/index.html
index 0e8bfc0..7cd8d4b 100644
--- a/level101/big_data/evolution/index.html
+++ b/level101/big_data/evolution/index.html
@@ -708,23 +708,13 @@
-
-
-
-
-
-
-
-
+
+
@@ -750,12 +740,6 @@
-
-
-
-
-
-
diff --git a/level101/big_data/intro/index.html b/level101/big_data/intro/index.html
index fbd92b4..0bbcb44 100644
--- a/level101/big_data/intro/index.html
+++ b/level101/big_data/intro/index.html
@@ -708,23 +708,13 @@
-
-
-
-
-
-
-
-
+
+
@@ -750,12 +740,6 @@
-
-
-
-
-
-
diff --git a/level101/big_data/tasks/index.html b/level101/big_data/tasks/index.html
index fc395bb..97ef29d 100644
--- a/level101/big_data/tasks/index.html
+++ b/level101/big_data/tasks/index.html
@@ -708,23 +708,13 @@
-
-
-
-
-
-
-
-
+
+
@@ -750,12 +740,6 @@
-
-
-
-
-
-
diff --git a/level101/databases_nosql/further_reading/index.html b/level101/databases_nosql/further_reading/index.html
index 96384ce..28c60a0 100644
--- a/level101/databases_nosql/further_reading/index.html
+++ b/level101/databases_nosql/further_reading/index.html
@@ -708,23 +708,13 @@
-
-
-
-
-
-
-
-
+
+
@@ -750,12 +740,6 @@
-
-
-
-
-
-
diff --git a/level101/databases_nosql/intro/index.html b/level101/databases_nosql/intro/index.html
index bd4bce3..1700e22 100644
--- a/level101/databases_nosql/intro/index.html
+++ b/level101/databases_nosql/intro/index.html
@@ -708,23 +708,13 @@
-
-
-
-
-
-
-
-
+
+
@@ -750,12 +740,6 @@
-
-
-
-
-
-
diff --git a/level101/databases_nosql/key_concepts/index.html b/level101/databases_nosql/key_concepts/index.html
index 86f151c..05dd3ed 100644
--- a/level101/databases_nosql/key_concepts/index.html
+++ b/level101/databases_nosql/key_concepts/index.html
@@ -708,23 +708,13 @@
-
-
-
-
-
-
-
-
+
+
@@ -750,12 +740,6 @@
-
-
-
-
-
-
diff --git a/level101/databases_sql/backup_recovery/index.html b/level101/databases_sql/backup_recovery/index.html
index c81efc9..811be70 100644
--- a/level101/databases_sql/backup_recovery/index.html
+++ b/level101/databases_sql/backup_recovery/index.html
@@ -771,23 +771,13 @@
-
-
-
-
-
-
-
-
+
+
@@ -813,12 +803,6 @@
-
-
-
-
-
-
diff --git a/level101/databases_sql/concepts/index.html b/level101/databases_sql/concepts/index.html
index 0084e3b..0f0f752 100644
--- a/level101/databases_sql/concepts/index.html
+++ b/level101/databases_sql/concepts/index.html
@@ -744,23 +744,13 @@
-
-
-
-
-
-
-
-
+
+
@@ -786,12 +776,6 @@
-
-
-
-
-
-
diff --git a/level101/databases_sql/conclusion/index.html b/level101/databases_sql/conclusion/index.html
index 4ff1f8a..a7be081 100644
--- a/level101/databases_sql/conclusion/index.html
+++ b/level101/databases_sql/conclusion/index.html
@@ -710,23 +710,13 @@
-
-
-
-
-
-
-
-
+
+
@@ -752,12 +742,6 @@
-
-
-
-
-
-
diff --git a/level101/databases_sql/innodb/index.html b/level101/databases_sql/innodb/index.html
index 8f5d30e..a9d44fd 100644
--- a/level101/databases_sql/innodb/index.html
+++ b/level101/databases_sql/innodb/index.html
@@ -758,23 +758,13 @@
-
-
-
-
-
-
-
-
+
+
@@ -800,12 +790,6 @@
-
-
-
-
-
-
diff --git a/level101/databases_sql/intro/index.html b/level101/databases_sql/intro/index.html
index c693e8b..d68bcf3 100644
--- a/level101/databases_sql/intro/index.html
+++ b/level101/databases_sql/intro/index.html
@@ -783,23 +783,13 @@
-
-
-
-
-
-
-
-
+
+
@@ -825,12 +815,6 @@
-
-
-
-
-
-
diff --git a/level101/databases_sql/lab/index.html b/level101/databases_sql/lab/index.html
index 430fa37..efbf4b0 100644
--- a/level101/databases_sql/lab/index.html
+++ b/level101/databases_sql/lab/index.html
@@ -705,23 +705,13 @@
-
-
-
-
-
-
-
-
+
+
@@ -747,12 +737,6 @@
-
-
-
-
-
-
diff --git a/level101/databases_sql/mysql/index.html b/level101/databases_sql/mysql/index.html
index 01767ba..3b962e9 100644
--- a/level101/databases_sql/mysql/index.html
+++ b/level101/databases_sql/mysql/index.html
@@ -744,23 +744,13 @@
-
-
-
-
-
-
-
-
+
+
@@ -786,12 +776,6 @@
-
-
-
-
-
-
diff --git a/level101/databases_sql/operations/index.html b/level101/databases_sql/operations/index.html
index a68fe19..f645a0a 100644
--- a/level101/databases_sql/operations/index.html
+++ b/level101/databases_sql/operations/index.html
@@ -16,7 +16,7 @@
- Operations - School Of SRE
+ Operational Concepts - School Of SRE
@@ -99,7 +99,7 @@
@@ -180,12 +180,14 @@
+
+
-
+
-
+