Hi,

Here we have the detailed blog about how to add custom modules in Odoo, you can have a look at it: https://www.cybrosys.com/blog/how-to-install-custom-modules-in-odoo

Also, there is video illustrating the same: How To Install Custom Module In Odoo

Thanks

how to update all module? using Terminal. I've try this one because its working in Odoo10, is the process same to Odoo11? if not what is the command line to update all module to the database? -c is not working. Thanks!

./odoo/odoo-bin -c /etc/odoo-server.conf -d TEST -u all