Set Up Default Password for Postgres User

 Upon installing postgres, there is no password for Postgres User

This is the way to set up default password for Postgres User in Linux

1. Open terminal
2. Type: sudo -u postgres psql <-p portNo> eg sudo -u postgres psql -p 5433 or sudo -u postgres psql for default port 5432
3. Type: postgres=# ALTER USER postgres PASSWORD '<your desired password>';
4. Type: \q to exit postgres and return back to terminal login

DONE!