И вот чего там у меня написано:  
                "CONSIDERATIONS FOR KNOPPIX 
                        ====================================   
 1.) There is no automatic start of external accessible services.   
 2.) There are no default passwords. All accounts are locked by default. 
     Even local logins are not possible (unless you set a password or create 
     new user accounts as root).   
 3.) Therefore, all local interactive processes are started by init without 
     authorization. 
     Version 1.x up to and including 2.1-21-08-2001: Because there is no 
     valid password for "su", but still the possibility should exist to use 
     the system as "rescue cd", all programs (including KDE) are running 
     under root id. 
     Changed from version 2.1-24-08-2001 and up: The graphical desktop 
     is started with the unprivileged user id "knoppix". Programs that 
     only work for root are started using sudo without password. This has 
     the advantage of making faults caused by defective software very 
     unlikely, but does not enhance local security, since it is fairly 
     easy to switch between the "knoppix" and "root" account. The knoppix 
     user should never be allowed for external logins (in the case that 
     sshd or similar servers are being launched)." 
 а про пароли ничего....... (а он все равно так и просит пароль ) честно говороя с английским у меня туго 
