postgres=# \du
                             List of roles
 Role name |                   Attributes                   | Member of
-----------+------------------------------------------------+-----------
[...]
 bucardo   | Superuser                                      | {}
[...]

postgres=# \l
                                  List of databases
   Name    |  Owner   | Encoding  |   Collate   |    Ctype    |   Access privileges
-----------+----------+-----------+-------------+-------------+-----------------------
 baculadir | postgres | SQL_ASCII | en_GB.UTF-8 | en_GB.UTF-8 | =Tc/postgres         +
           |          |           |             |             | postgres=CTc/postgres+
           |          |           |             |             | bucardo=CTc/postgres
 bucardo   | bucardo  | UTF8      | en_GB.UTF-8 | en_GB.UTF-8 | =Tc/bucardo          +
           |          |           |             |             | bucardo=CTc/bucardo