git clone --branch 15.0 --depth 1 https://github.com/odoo/odoo.git odoo15
cd odoo15
pip3 install -r requirements.txt

Crear Base de datos

Inicializar base de datos

python3 odoo-bin -r admin -w adminpwd --addons-path=addons -d odoo15 --db_host localhost -i all
OR
./odoo-bin --database=codingdodo_demo --db_user=odoo --db_password=codingdodo -i base --without-demo=all --save -c /home/odoo/.odoorc_codingdodo_demo --stop-after-init

installa buil essentials

sudo apt install build-essential
sudo apt-get install libxml2-dev libxslt1-dev python3-dev
sudo apt-get install libsasl2-dev python-dev libldap2-dev libssl-dev

pip3 install psycopg2-binary

Si da el siguiente error:

error in vatnumber setup command: use_2to3 is invalid.

aplicar el siguiente comando:

pip3 install "setuptools<58.0"

sudo apt install postgresql
sudo su - postgres -c "createuser -s odoo"