As for backup, pg_dump dbname > db.dump will do the dump, psql -f db.dump dbname will do the restore. There are, of course, far more complicated ways of doing

As for backup, pg_dump dbname > db.dump will do the dump, psql -f db.dump dbname will do the restore. There are, of course, far more complicated ways of doing it, including doing it in binary format, or data / schema only, or individual tables, but those are all a flag or two away.