Update the packages and kernel.

sudo apt-get update && sudo apt-get upgrade

Install development tools (c++, cmake).

sudo apt-get install git cmake subversion libav-tools dh-autoreconf libcurl4-openssl-dev yasm libx264-dev pkg-config

If you want to use IP cameras, make sure to compile FFMPEG with x264 support.

git clone ffmpeg
cd ffmpeg && git checkout remotes/origin/release/2.8
./configure --enable-gpl --enable-libx264 --enable-shared --prefix=/usr/local
make && sudo make install

Go to home directory and pull the machinery from github.

cd && git clone

Compile the machinery; this can take some time.

cd machinery && mkdir build && cd build
cmake .. && make && make check && sudo make install

Start the machinery on start-up.

sudo systemctl enable kerberosio


The configuration files can be found at /etc/opt/kerberosio/config. By default the Raspberry Pi Camera module is set as capture device. You can update the config.xml file to change it to USBCamera or IPCamera. Images are stored in the /etc/opt/kerberosio/capture directory by default; this location can be changed by editing the io.xml file.


After kerberos is installed a binary is available at /usr/bin/kerberosio. Just run following command in your terminal to start kerberosio.



Install web

If you want to install the web, you'll need to have a webserver (e.g. Nginx) and PHP running with some extensions. You also need NodeJS and npm installed to install Bower. Below you can find the installation procedure to install the web on your preferred environment.

Install Dependencies

Install Git, PHP7 (+extensions) and NodeJS.

A) Ubuntu

sudo apt-get update && sudo apt-get upgrade
curl -sL | sudo bash -
sudo apt-get install git php7.0-cli php7.0-gd php7.0-mcrypt php7.0-curl php7.0-mbstring php7.0-dom php7.0-zip php7.0-fpm nodejs npm
sudo ln -s /usr/bin/nodejs /usr/bin/node

B) Raspbian

echo "deb stretch main contrib non-free rpi" | sudo tee --append /etc/apt/sources.list
sudo apt-get update
sudo apt-get install -t stretch php7.0 php7.0-curl php7.0-gd php7.0-fpm php7.0-cli php7.0-opcache php7.0-mbstring php7.0-xml php7.0-zip php7.0-mcrypt nodejs npm
sudo ln -s /usr/bin/nodejs /usr/bin/node


brew install php7.0 php7.0-curl php7.0-gd php7.0-fpm php7.0-cli php7.0-opcache php7.0-mbstring php7.0-xml php7.0-zip php7.0-mcrypt nodejs npm

Configure webserver

Install Nginx,

sudo apt-get install nginx

or if you're running OSX use brew.

sudo brew install nginx

Creating a Nginx config.

sudo rm -f /etc/nginx/sites-enabled/default
sudo nano /etc/nginx/sites-enabled/default

Copy and paste following config file; this file tells nginx where the web will be installed and that it requires PHP.

    listen 80 default_server;
    listen [::]:80 default_server;
    root /var/www/web/public;
    index index.html index.htm index.nginx-debian.html;
    server_name kerberos.rpi kerberos.rpi;
    index index.php index.html index.htm;
    location /
            autoindex on;
            try_files $uri $uri/ /index.php?$query_string;
    location ~ \.php$
            fastcgi_pass unix:/var/run/php/php7.0-fpm.sock;
            fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
            include fastcgi_params;

Clone source

Create a www location.

mkdir -p /var/www

Get the source code from Github.

cd /var/www && sudo git clone && cd web

Install PHP packages by using composer.

curl -sS | sudo php
sudo mv composer.phar /usr/bin/composer
sudo composer install

Add write permission for the storage directory, and the kerberos config file.

sudo chmod -R 777 storage
sudo chmod -R 777 bootstrap/cache
sudo chmod 777 config/kerberos.php

Install bower globally by using npm.

sudo npm -g install bower

Install Front-end dependencies with bower

cd public
sudo bower --allow-root install


sudo reboot

Auto removal

By default images or videos aren't removed automatically. This means that will keep writing to disk, even if there is no more space available on your disk. When your disk is full you'll be experiencing strange errors: a corrupt web interface, blank images or corrupt videos.

To resolve this your should install a simple bash script and initiate a cronjob which continuously poll your filesystem, and start removing media when your disk is getting full.

Create a bash script and copy following script.

nano /home/[your user]/

Copy following script (make sure the partition is correct, this is the default one for a Raspberry Pi).

if [[ $(df -h | grep $partition | head -1 | awk -F' ' '{ print $5/1 }' | tr ['%'] ["0"]) -gt 90 ]];
    echo "Cleaning disk"
    find $imagedir -type f | sort | head -n 100 | xargs -r rm -rf;

Make the script executable.

chmod +x /home/[your user]/

Initiate a cronjob, and select the nano editor.

crontab -e

Append following line, to execute the script every 5min.

*/5 * * * * /bin/bash /home/[your user]/