@sarkar

Odoo needs to be run it by an user different that root. I you are running it on localhost you could use your own user, but if you are running it on a server you need to create an user just to run Odoo.

This is how you could create a new user named odoo on the server:

adduser --system --group odoo

Depending of what you are using for manage the Odoo server you need to configure the new user as the own for run the Odoo server.

For upstart like services using start-stop-daemon, check that the line that execute Odoo have the --chuid specified like:

start-stop-daemon --start --quiet --pidfile ${PIDFILE} --chuid ${USER} --background --make-pidfile --exec ${DAEMON} -- ${DAEMON_OPTS}

For systemd services, check that the user to run the service is specified like:

[Unit]
Description=Odoo Open Source ERP and CRM
After=network.target postgresql.service
[Service]
Type=simple
User=odoo
ExecStart={service_bin} {service_args}
[Install]
WantedBy=multi-user.target

For supervisor services, check that the user to run the service is specified like:

[program:odoo_server_{instance}]
user=odoo
directory = {base_path}/{instance}
command = {service_bin} {service_args}
autostart=true
autorestart=true
stdout_logfile = {base_path}/logs/{instance}/{proy_name}/supervisor-out.log
stderr_logfile = {base_path}/logs/{instance}/{proy_name}/supervisor-err.log

it has also ask for odoo password where i can find it 

when i was use sudo su - odoo -s /bin/bash  command