Odoo addons

To add modules: 
 first create a location of where the modules will be stored. Odoo does not make one by default. You will need to create your own path. 
 /home/some/location/you/want/extra-addons 
 Edit the files:  
 /etc/odoo/odoo.conf 
 Add path in that file: Any spot in the file will do.  
 addons_path = /home/some/location/you/want/extra-addons 
 Restart Odoo to make sure it is working 
 sudo systemctl restart odoo