Backup

pg_dump -h HOST -U postgres -W -Ft DATABASE > FILE

Restore

pg_restore -h HOST -U postgres -d DATABASE -W FILE

Inserindo functions no ~/.bashrc

$ nano ~/.bashrc
$ backup() { pg_dump -h $1 -U postgres -W -Ft $2 > $3; }
$ restore() { pg_restore -h $1 -U postgres -d $2 -W $3; }

Executando o Comando

$ backup 127.0.0.1 wordpress wordpress.tar