.openerp_serverrc

Default admin master password is stored in openerp-server.conf

but its not given forgotten one.

Master password for openerp will found at .openerp_serverrc file.

Which located at home directory

Open Terminal

user@ubuntu: cat .openerp_serverrc [options] addons_path = -------------------
admin_passwd = admin
csv_internal_sep = ,

Here you found your master admin password.

For those in windows, inside the Odoo installation folder, just go to the "server" folder/directory and you'll find the odoo.conf

Just change the admin_passwd in odoo.conf, it work for me !

video reference here

I just comment the entry of admin_pass and reload manager link and config file was rewritten so we can rewrite admin_pass

in your openerp-server.conf, comment line that contain admin_passwd = , then open your odoo. you will be asked to set new master password

if you change it manually on openerp-server.conf, your password will be saved as plain text, not encrypted

i changed the admin passwd in conf file in windows and restart odoo service but error database connection denied is still coming

There is an confusing mix of terminoly from odoo since:

The "master password" is named "admin_passwd" in the config file (usually, "odoo.conf".) This leads to confusion, since there is no "master" user anywhere in Odoo.

The "database admin" password (one for each indiviual database) is stored (Odoo 12+) inside the postgres database. It's also encrypted, so you can only clear it and reset it in the web interface.

The admin IS the master.

refer this link...

https://www.odoo.com/forum/help-1/question/recovering-master-password-73750#answer-73755

Hi, you can check out if you can get solution from SmartKey Password Recovery Bundle: http://www.recoverlostpassword.com

Please refer to the answers to this question: https://accounts.openerp.com/forum/Help-1/question/478/

If you are talking about the OpenERP admin user password, you can recover it if your database passwords aren't encrypted. (as for any other OpenERP user password)

  SELECT login, password FROM res_users WHERE login = 'admin';