mysql user management tips

#change   root   passwd  
  use   mysql;  
  update   user   set   password=password('rootpasswd')   where   user='root';  
  flush   privileges;  
   
  #add   user  
  use   mysql;  
  GRANT   ALL   PRIVILEGES   ON   *.*   TO   newuser@localhost   IDENTIFIED   BY   'newuserpasswd'   WITH   GRANT   OPTION;  
  #user   name   'newuser',password   'newuserpasswd',can   login   from   localhost   with    
  #   full   privileges.  
  flush   privileges;  
  #refresh   privileges   to   make   your   modifies   valid,or   you   should   have   to   restart    
  #your   mysql   server.  
  #any   questions,   please   read   mysql-doc.  
  #good   luck.  
  #   kurt   Xiang.   xqterry@yeah.net