Hi

pg_dump dbname | gzip > filename.gz
Reload with
createdb dbname
gunzip -c filename.gz | psql dbname

or you can refer link: http://www.postgresql.org/docs/8.1/static/backup.html

https://linuxize.com/post/how-to-setup-automatic-odoo-backup/

Hi,

A. To backup your database

    1. switch to postgres user

    sudo su - postgres

    2. backup with the ff command;

    pg_dump db_name > db_backup.sql

     [note db_name is the name of the database you want to backup; db_backup.sqlis the name you want to give your backup. Whatever name you want to give to your backup, end it with the .sql extension]

    3. To get the location of your backup, run this command from the terminal

    find / -name db_backup.sql

B.

    1. If your database is on a remote computer, connect to it using WinSCP;  supply your username and password

    2. browse to the directory where your backup is saved as gotten in step 3 of A above

     3. you can then copy the sql file to your desired location or download to a location on your local computer in case it is on         a remote computer.

I hope this helps a lot.