How to Install Odoo12 on Ubuntu 18.10

Create the Odoo user & group by using the following command

root@linuxhelp:~# adduser --system --home=/opt/odoo --group odoo
Adding system user `odoo' (UID 125) ...
Adding new group `odoo' (GID 130) ...
Adding new user `odoo' (UID 125) with group `odoo' ...
Creating home directory `/opt/odoo' ...

Install the postgresql by using the following command

root@linuxhelp:~# apt install postgresql
Reading package lists... Done
Building dependency tree       
Reading state information... Done
The following additional packages will be installed:
  libpq5 postgresql-10 postgresql-client-10 postgresql-client-common postgresql-common sysstat
Suggested packages:
  postgresql-doc locales-all postgresql-doc-10 libjson-perl isag
The following NEW packages will be installed:
  libpq5 postgresql postgresql-10 postgresql-client-10 postgresql-client-common postgresql-common
  sysstat
0 upgraded, 7 newly installed, 0 to remove and 407 not upgraded.
Need to get 5,450 kB of archives.
After this operation, 21.5 MB of additional disk space will be used.
.
.
Success. You can now start the database server using:

    /usr/lib/postgresql/10/bin/pg_ctl -D /var/lib/postgresql/10/main -l logfile start

Ver Cluster Port Status Owner    Data directory              Log file
10  main    5432 down   postgres /var/lib/postgresql/10/main /var/log/postgresql/postgresql-10-main.log
update-alternatives: using /usr/share/postgresql/10/man/man1/postmaster.1.gz to provide /usr/share/man/man1/postmaster.1.gz (postmaster.1.gz) in auto mode
Setting up postgresql (10+193) ...
Processing triggers for systemd (239-7ubuntu10) ...

Start the postgresql service

root@linuxhelp:~# systemctl start postgresql

Enable the postgresql service

root@linuxhelp:~# systemctl enable postgresql
Synchronizing state of postgresql.service with SysV service script with /lib/systemd/systemd-sysv-install.
Executing: /lib/systemd/systemd-sysv-install enable postgresql

Switch to postgre user

root@linuxhelp:~# su – postgres

Create the user and database for odoo

postgres@linuxhelp1:~$ createuser --createdb --username postgres --no-createrole --no-superuser --pwprompt odoo12
Enter password for new role: 
Enter it again: 

postgres@linuxhelp1:~$ logout

Switch to odoo user by using the following command

root@linuxhelp:~# su - odoo -s /bin/bash
Cloning the Odoo12 from the GitHub repository by using the following command 
odoo@linuxhelp1:~$ git clone https://www.github.com/odoo/odoo --depth 1 --branch 12.0 /opt/odoo/odoo
Cloning into '/opt/odoo/odoo'...
warning: redirecting to https://github.com/odoo/odoo.git/
remote: Enumerating objects: 24386, done.
remote: Counting objects: 100% (24386/24386), done.
remote: Compressing objects: 100% (19194/19194), done.
remote: Total 24386 (delta 7316), reused 14635 (delta 4375), pack-reused 0
Receiving objects: 100% (24386/24386), 101.27 MiB | 1.05 MiB/s, done.
Resolving deltas: 100% (7316/7316), done.
Checking out files: 100% (21876/21876), done.

odoo@linuxhelp1:~$ logout

Change to to odoo path:

root@linuxhelp:~# cd /opt/odoo/odoo
List out the files
root@linuxhelp:/opt/odoo/odoo# ls
addons           COPYRIGHT  doc      MANIFEST.in  odoo-bin   requirements.txt  setup      setup.py
CONTRIBUTING.md  debian     LICENSE  odoo         README.md  SECURITY.md       setup.cfg

Install the python modules by using the pip3 command

root@linuxhelp:/opt/odoo/odoo# pip3 install -r requirements.txt
Ignoring gevent: markers 'sys_platform != "win32" and python_version >= "3.7"' don't match your environment
Ignoring greenlet: markers 'python_version >= "3.7"' don't match your environment
Ignoring lxml: markers 'sys_platform != "win32" and python_version >= "3.7"' don't match your environment
Ignoring lxml: markers 'sys_platform == "win32"' don't match your environment
Ignoring pypiwin32: markers 'sys_platform == "win32"' don't match your environment
Collecting Babel==2.3.4 (from -r requirements.txt (line 1))
  Downloading https://files.pythonhosted.org/packages/b4/ec/acd307eac2e23f9cab1c8bdbe29b3b1d43215e31c32f8aa91b3a97925b5b/Babel-2.3.4-py2.py3-none-any.whl (7.1MB)
    100% |████████████████████████████████| 7.1MB 157kB/s 
Requirement already satisfied: chardet==3.0.4 in /usr/lib/python3/dist-packages (from -r requirements.txt (line 2))
Collecting decorator==4.0.10 (from -r requirements.txt (line 3))
  Downloading https://files.pythonhosted.org/packages/53/24/cc53f9f216dd5ef269e0af7c7651cbda162554a5b088621a205961c07a6f/decorator-4.0.10-py2.py3-none-any.whl
Collecting docutils==0.12 (from -r requirements.txt (line 4))

Successfully installed Babel-2.3.4 Jinja2-2.10.1 Mako-1.0.4 MarkupSafe-0.23 Pillow-4.0.0 PyPDF2-1.26.0 Werkzeug-0.11.15 XlsxWriter-0.9.3 beautifulsoup4-4.8.0 decorator-4.0.10 docutils-0.12 ebaysdk-2.1.5 feedparser-5.2.1 gevent-1.1.2 greenlet-0.4.10 html2text-2016.9.19 libsass-0.12.3 lxml-3.7.1 mock-2.0.0 num2words-0.5.6 ofxparse-0.16 passlib-1.6.5 pbr-5.4.2 psutil-4.3.1 psycopg2-2.7.3.1 pydot-1.2.3 pyldap-2.4.28 pyparsing-2.1.10 pyserial-3.1.1 python-dateutil-2.5.3 python-stdnum-1.11 pytz-2016.7 pyusb-1.0.0 qrcode-5.3 reportlab-3.3.0 requests-2.20.0 soupsieve-1.9.2 suds-jurko-0.6 vatnumber-1.2 vobject-0.9.3 xlrd-1.0.0 xlwt-1.3.0

root@linuxhelp:/opt/odoo/odoo# vim odoo.conf
[options]
; This is the password that allows database operations:
;admin_passwd = admin
db_host  = localhost
db_port = 5432
db_user = odoo12
db_password = Linuxc#4
addons_path = /opt/odoo/odoo/addons

root@linuxhelp:/opt/odoo/odoo# chmod -R 755 odoo.conf

root@linuxhelp:/opt/odoo/odoo# chown -R odoo:odoo odoo.conf

root@linuxhelp:/opt/odoo/odoo# ./odoo-bin --config=odoo.conf
Running as user 'root' is a security risk.
2019-08-05 19:42:55,488 34981 INFO ? odoo: Odoo version 12.0 
2019-08-05 19:42:55,489 34981 INFO ? odoo: Using configuration file at /opt/odoo/odoo/odoo.conf 
2019-08-05 19:42:55,489 34981 INFO ? odoo: addons paths: ['/root/.local/share/Odoo/addons/12.0', '/opt/odoo/odoo/addons', '/opt/odoo/odoo/odoo/addons'] 
2019-08-05 19:42:55,489 34981 INFO ? odoo: database: odoo12@localhost:5432 
2019-08-05 19:42:55,845 34981 INFO ? odoo.addons.base.models.ir_actions_report: Will use the Wkhtmltopdf binary at /usr/local/bin/wkhtmltopdf 
2019-08-05 19:42:56,570 34981 INFO ? odoo.service.server: HTTP service (werkzeug) running on linuxhelp1:8069