Added a script to perform the manual update

docs/source/jetson/peripheral/network.rst

@@ -226,7 +226,7 @@ In case the date is not automatically updated, you can force the update by stopp
     $ sudo ntpd -s 192.168.2.185
     $ sudo service ntp start
 
-Finally, check if the date is updated:
+A script to perform the manual update can be found in the `Github page <https://raw.githubusercontent.com/lsa-pucrs/platypus_doc/master/docs/source/jetson/scripts/update_clock.sh>`_. Finally, check if the date is updated:
 
 .. code-block:: bash
 

docs/source/jetson/scripts/update_clock.sh

@@ -0,0 +1,19 @@
+#!/bin/bash
+
+# This script updates the clock of the Jetson by checking the server
+# located in ``IP`` machine. The server must be broadcasting NTP in 
+# the connected network. In order to configure NTP server and client, 
+# please check
+# http://platypus-boats.readthedocs.io/en/latest/source/jetson/peripheral/network.html#syncronizing-clocks-in-jetson-tk1
+#
+
+if [[ $# -ne 1 ]]; then
+    echo "ERROR: update clock by passing the IP of the server"
+    echo "./update_clock.sh 192.168.2.185"
+elif [[ $1 =~ ^[0-9]+\.[0-9]+\.+[0-9]+\.[0-9]+$ ]]; then
+    sudo service ntp stop
+    sudo ntpd -s $1
+    sudo service ntp start
+else
+    echo "ERROR: $1 is not a valid IP address"
+fi