I already have a odoo 8 instance in my server.

Now i want to instal odoo9 on the same server

what are the steps i can follow

Is there any proper documentation for this...

 I already have a odoo8 instance ) linux 14.04 .I followd below steps for the installation .So which of the steps i can changed when I install odoo9 on the same server

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. sudo apt-get install openssh-server

2. sudo apt-get update

3. sudo apt-get dist-upgrade

4. Create the OpenERP user that will own and run the application

                a. sudo adduser --system --home=/opt/odoo --group odoo

                b. sudo su - odoo -s /bin/bash

                c. exit

5. Install and configure the database server, PostgreSQL

                a. sudo apt-get install postgresql

                b. sudo su - postgres

                c. createuser --createdb --username postgres --no-createrole --no-superuser --pwprompt odoo

                d. exit

6. sudo apt-get install python-dateutil python-decorator python-docutils python-feedparser \

python-gdata python-gevent python-imaging python-jinja2 python-ldap python-libxslt1 python-lxml \

python-mako python-mock python-openid python-passlib python-psutil python-psycopg2 python-pybabel \

python-pychart python-pydot python-pyparsing python-pypdf python-reportlab python-requests \

python-simplejson python-tz python-unittest2 python-vatnumber python-vobject python-werkzeug \

python-xlwt python-yaml wkhtmltopdf

7. Install the Odoo server

                a. sudo apt-get install git

                b. sudo su - odoo -s /bin/bash

                c. git clone https://www.github.com/odoo/odoo --depth 1 --branch 8.0 --single-branch

                Once it’s finished exit from the odoo user: exit.

8. Configuring the OpenERP application

                a. sudo cp /opt/odoo/odoo/debian/openerp-server.conf /etc/odoo-server.conf            

                b. sudo chown odoo: /etc/odoo-server.conf

                c. sudo chmod 640 /etc/odoo-server.conf

                d. sudo nano /etc/odoo-server.conf

                                change addons paths to : addons_path = /usr/lib/python2.7/dist-packages/openerp/addons so that it reads [addons_path = /opt/odoo/addons            ]

                                add this line:- logfile = /var/log/odoo/odoo-server.log

                e. sudo su - odoo -s /bin/bash

                f. /opt/odoo/openerp-server

                -------------------------------------------------

                Just copy paste (odoo-server) file into /etc/init.d folder

9. Installing the boot script

                a. create odoo-server file in /etc/init.d (sudo nano /etc/odoo-server.conf) and paste shell_command file data, add premission before creating the file

                b. sudo chmod 755 /etc/init.d/odoo-server

                c. sudo chown root: /etc/init.d/odoo-server

                d. sudo mkdir /var/log/odoo

                e. sudo chown odoo:root /var/log/odoo

10. Testing and Running Openerp

                a. sudo /etc/init.d/odoo-server start (starting server)

                b. less /var/log/odoo/odoo-server.log (log file)

                c. sudo /etc/init.d/odoo-server stop (stoping server)

11. Automating OpenERP startup and shutdown

                a. sudo update-rc.d odoo-server defaults

12. ps aux | grep odoo is used for checking server status

Need a help...