# If you have already created DB then don't need to follow 1st step:-
# STEP=1
# open terminal then run following commands to create postgres database and user:-
sudo -u postgres psql
postgres=# create database mydb;
postgres=# create user myuser with encrypted password 'mypass';
postgres=# grant all privileges on database mydb to myuser;
# STEP=2
# c used for selecting your database.
postgres=# c yourdatabasename
# i used for importing dump data in database.
yourdatabasename=# i path_of_your_dump_file for example:-
yourdatabasename=# i /home/developer/projects/django_projects/db_dump.sql
# If you face this type of error when you importing data:-
# ERROR: role "yourusername" does not exist
# so you can make superuser to your "db_user/yourusername" using this command:-
postgres=# ALTER USER fusion WITH SUPERUSER;
ALTER ROLE