ayuda Failed to connect to the database: could not connect to server metasploit

[juanxo12]

Hola, me aparece este error ,alguien me puede echar una mano?

root@kali:~# msfconsole
[-] Failed to connect to the database: could not connect to server: Connection refused
   Is the server running on host "localhost" (::1) and accepting
   TCP/IP connections on port 7337?
could not connect to server: Connection refused
   Is the server running on host "localhost" (127.0.0.1) and accepting
   TCP/IP connections on port 7337?

                                                 
....

msf > db_status

• postgresql selected, no connection
  msf > db_connect -y /usr/share/metasploit-framework/config/database.yml
  
• Rebuilding the module cache in the background...
  msf > db_status
  
• postgresql connected to msf
  msf >