Update the system and install all necessary packages sudo apt-get update && sudo apt-get -y upgradesudo apt-get install git python-pip python-dev python-virtualenv libevent-dev gcc libjpeg-dev libxml2-dev libssl-dev libsasl2-dev node-less libldap2-dev libxslt-dev Install PostgreSQL sudo apt-get install postgresql-9.5 postgresql-server-dev-9.5 sudo systemctl enable postgresql.service sudo systemctl start postgresql.service Create Odoo users sudo adduser --system --group odoo10 --home /opt/odoo10 sudo adduser --system --group odoo9 --home /opt/odoo9 Create PostgreSQL database users, odoo10 and odoo9: sudo su - postgres -c "createuser --createdb --username postgres --no-createrole --no-superuser --no-password odoo10" sudo su - postgres -c "createuser --createdb --username postgres --no-createrole --no-superuser --no-password odoo9" Switch to user odoo10 sudo su - odoo10 -s /bin/bash Clone the Odoo 10.0 git clone http://www.github...