Saludos a todos, se que es un tema muy tocado, pero no encuentro la respuesta en el foro ni google.

Os pongo en situacion:

"sudo service mysql start
start: Job is already running: mysql
"

msf > db_driver

•     Active Driver: postgresql
•         Available: postgresql, mysql

msf > db_driver mysql

• Using database driver mysql

msf > db_connect root:*******@127.0.0.1/msf3
[-] Error while running command db_connect: Failed to connect to the database: Can't connect to MySQL server on '127.0.0.1' (110)

Call stack:
./lib/msf/ui/console/command_dispatcher/db.rb:1827:in `db_connect_mysql'
./lib/msf/ui/console/command_dispatcher/db.rb:1710:in `send'
./lib/msf/ui/console/command_dispatcher/db.rb:1710:in `cmd_db_connect'
/opt/framework-3.7.2/msf3/lib/rex/ui/text/dispatcher_shell.rb:376:in `send'
/opt/framework-3.7.2/msf3/lib/rex/ui/text/dispatcher_shell.rb:376:in `run_command'
/opt/framework-3.7.2/msf3/lib/rex/ui/text/dispatcher_shell.rb:338:in `run_single'
/opt/framework-3.7.2/msf3/lib/rex/ui/text/dispatcher_shell.rb:332:in `each'
/opt/framework-3.7.2/msf3/lib/rex/ui/text/dispatcher_shell.rb:332:in `run_single'
/opt/framework-3.7.2/msf3/lib/rex/ui/text/shell.rb:198:in `run'
./msfconsole:130
msf >

Porque??

lo he solucionado, instalando todo de nuevo, ya estan en la version 4.0.
:-) ya  me funciona de maravilla.

Creo que el problema viene de no conectar primero con 'msfrpcd'