[root@localhost ~]# 
[root@localhost ~]# su - postgres
-bash-3.00$ psql voss 
Welcome to psql 8.1.3, the PostgreSQL interactive terminal.
Type:  \copyright for distribution terms
       \h for help with SQL commands
       \? for help with psql commands
       \g or terminate with semicolon to execute query
       \q to quit
voss=# select * from ghadmin;
adminname |   passwd    | admintype | adminstatus | isused | creater 
-----------+-------------+-----------+-------------+--------+---------
root      | rootroot123 |         0 |           0 |      1 | 
voss=#\q
-bash-3.00$ exit
logout