Hi Paresh!
Thanks for your prompt reply.
I got 3 odoo.conf file in these location:
/etc/odoo/odoo.conf

/etc/nginx/conf.d/odoo.conf

/usr/lib/python3/dist-packages/odoo/addons/point_of_sale/tools/posbox/configuration/odoo.conf
However, I don't think any of these files is the correct one.

I'm trying to modify the worker value to solve the persisting connection lost problem.

Hi Chijioke:

Log in to your server and type in "find / -name odoo.conf" to find the location of the file.