diff --git a/update_nightscout.sh b/update_nightscout.sh
new file mode 100644
index 00000000000..28f645a3a9a
--- /dev/null
+++ b/update_nightscout.sh
@@ -0,0 +1,129 @@
+#!/bin/bash
+
+echo
+echo "Install Nightscout again, from the official repository or from a fork"
+echo
+
+
+if [ "`id -u`" != "0" ]
+then
+echo "Script needs root - execute bootstrap.sh or use sudo bash installation.sh"
+echo "Cannot continue.."
+exit 5
+fi
+
+echo "Installing dialog"
+sudo apt-get update
+sudo apt-get -y install dialog
+
+# Setting the defaults to correspond to the official Nightscout repository. 
+user="nightscout"
+repo="cgm-remote-monitor"
+brnch="master"
+
+clear #  Clear the screen before placing the next dialog on.
+dialog --yesno "Reinstall official Nightscout?\n\n
+Choose Yes to install the latest version of official Nightscout.\n\n
+Choose No to install from a fork (advanced).\n\n
+Or, press escape to cancel." 14 50
+ans=$?
+if [ $ans = 255 ] # Exit if escape is pressed.
+then
+clear # Clear the screen before exiting.
+echo "Escape"
+echo "Cannot continue."
+exit 5
+elif [ $ans = 1 ] # We need Github details
+then
+# Clear fork parameters so that we can detect user not entering them all.
+user=""
+repo=""
+brnch=""
+
+# open fd
+exec 3>&1
+
+# Ask for the fork details. 
+clear # Clear the screen before placing the next dialog on.
+VALUES=$(dialog --ok-label "Submit" --form "Enter the GitHub details for the Nightscout version you want to install.\n" 12 50 0 "User ID:" 1 1 "$user" 1 14 25 0 "Repository:" 2 1 "$repo" 2 14 25 0 "Branch:" 3 1 "$brnch" 3 14 25 0 2>&1 1>&3)
+ans2=$?
+if [ $ans2 = 255 ] || [ $ans2 = 1 ] # Exit if escaped or cancelled
+then
+clear # Clear dialog.
+echo "Escape or Cancel"
+echo "Cannot continue."
+exit 5
+fi
+
+# close fd
+exec 3>&-
+
+# Assign the entered values to corresponding parameters 
+user=$(echo "$VALUES" | sed -n 1p)
+repo=$(echo "$VALUES" | sed -n 2p)
+brnch=$(echo "$VALUES" | sed -n 3p)
+if [ "$user" = "" ] || [ "$repo" = "" ] || [ "$brnch" = "" ] # Abort if either paramter was left blank. 
+then
+clear # clear before exiting
+echo "Missing fork parameters"
+echo "Cannot continue."
+exit 5
+fi
+fi
+clear  # Clear the last dialog
+
+cd /
+if [ -s ./nightscout_start ] # Delete the previous install directory if it exists.
+then
+sudo rm -r nightscout_start
+fi
+sudo mkdir nightscout_start # Create a directory where the GitHub fork will be extracted to.
+cd /nightscout_start
+
+combined="https://github.com/$user/$repo.git" # This is the path to the repository we are installing from.
+sudo git clone $combined
+
+# Kill Nightscout to speed up the install.
+sudo pkill -f SCREEN
+cd $repo
+sudo git checkout $brnch
+sudo git pull
+
+sudo npm install
+sudo npm run postinstall # Complete the install.
+
+
+# Create the first section of the Nightscout start script replacing the $repo variable
+# with its value, the entered repository title. 
+cat> /etc/nightscout-start.sh<<EOF
+
+#!/bin/sh
+export PATH="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin"
+. /etc/nsconfig
+export MONGO_COLLECTION="entries"
+export MONGO_CONNECTION="mongodb://username:password@localhost:27017/Nightscout"
+export INSECURE_USE_HTTP=true
+export HOSTNAME="127.0.0.1"
+export PORT="1337"
+cd /nightscout_start/$repo
+EOF
+
+# Create the last section of the Nightscout start script
+# not replacing the argument of while with its value.
+cat>> /etc/nightscout-start.sh<< "EOF"
+
+while [ "`netstat -lnt | grep 27017 | grep -v grep`" = "" ]
+do
+echo "Waiting for mongo to start"
+sleep 5
+done
+sleep 5
+while [ 1 ]
+do
+node server.js
+sleep 30
+done
+EOF
+
+sudo reboot # Reboot so that Nightscout starts.
+