1，先查看postgresql的端口，默认是自动开启的，端口7337 。
 
root@bt:~# netstat -tnpl |grep postgres
tcp        0      0 127.0.0.1:7337          0.0.0.0:*               LISTEN      1100/postgres
tcp6       0      0 ::1:7337                :::*                    LISTEN      1100/postgres

2，查看msf的配置,里面有数据库用户和密码

root@bt:~# cat /opt/metasploit/config/database.yml
development: www.2cto.com
adapter: "postgresql"
database: "msf3dev"
username: "msf3"
password: "c80c3cea"
port: 7337
host: "localhost"
pool: 256
timeout: 5

3，开启msf专业版
 
# /opt/metasploit/msfpro

4，连接数据库
 
msf> db_connect msf3:c80c3cea@127.0.0.1:7337/msf3