Administrator Guide : Security : Encryption : Changing the encryption password
  
Changing the encryption password
To change the password of the encryption key, solidDB® must be started using option -E and the options specifying the old and the new password.
Procedure
To change the encryption password, start solidDB® with the following command syntax:
solid -E -x keypwdfile:<old key filename>
    -x keypwdfile:<new key filename>
For example:
solid -E -x keypwdfile:pwd.txt -x keypwdfile:newpdw.txt
Alternatively, you can specify the new and old password using the command-line option -S.
solid -E -S <old_password> -S <new_password>
See also
Encryption