diff --git a/sensor-node/modules/ROOT/nav.adoc b/sensor-node/modules/ROOT/nav.adoc
index 962b56d..ffbb481 100644
--- a/sensor-node/modules/ROOT/nav.adoc
+++ b/sensor-node/modules/ROOT/nav.adoc
@@ -1,3 +1,2 @@
 * xref:index.adoc[Sensor mode]
 * xref:index-imu.adoc[node IMU]
-* xref:exer.adoc[Exercises]
diff --git a/sensor-node/modules/ROOT/pages/exer.adoc b/sensor-node/modules/ROOT/pages/exer.adoc
deleted file mode 100644
index 77cb5d3..0000000
--- a/sensor-node/modules/ROOT/pages/exer.adoc
+++ /dev/null
@@ -1,84 +0,0 @@
-= Network Scanning - exercises!
-  
-== Find TCP Ports connections
-
-* Connect to master
-
-* Find All TCP Ports connections
-** save it
-
-* Find All UDP Ports connections
-** save it
-
-* run 
-
-[source,bash]
-----
-cd /project/courses/fluentd
-# run
-./fluentd.yml.sh
-----
-
-
-* Find All TCP Ports connections
-** save it
-
-
-* Find All UDP Ports connections
-** save it
-
-NOTE:  try to find the differences between them!
-
-== Find All live hosts
-
-* Find All live hosts
-** save it
-
-== Find open TCP Ports in All hosts
-
-* Find All open TCP Ports in All hosts
-** save it
-
-== SSH connect
-
-[source,bash]
-----
-ssh docker@[IP]
-----
-
-
-=== SSH exec remote  command
-
-Run command using the following syntax:
-
-[source,bash]
-----
-## user syntax ##
-ssh -t docker@192.168.128.3 'ip a'
-
-## sudo syntax ##
-ssh -t docker@192.168.128.3 'echo docker | sudo -S cat /etc/passwd'
-# ^^^^^ USER ^^^ IP ^^^^^^^ sudo password ^^^^^^^^   COMMAND 
-
-## su syntax ##
-ssh docker@nas01 su -c "/path/to/command1 arg1 arg2"
-----
-
-
-== SSH password
-
-[source,bash]
-----
-SSH password: 
-SUDO password[defaults to SSH password]: 
-----
-
-password: *docker*
-
-SUDO password: *docker*
-
-
-
-
-
-