postgresql dump and restore db

1psql -U postgres -h localhost -p 5432 -f data_dump.sql

1psql -d database_name -f backup.sql

1#To dump a database called mydb into a SQL-script file:
2pg_dump mydb > db.sql
3
4#To reload such a script into a (freshly created) database named newdb:
5psql -d newdb -f db.sql