SLF4J - The Simple Logging Facade for Java

SL4J allows us to use the desired logger mechanism at deployment time. SL4J supports

-Log4j
-java.util.logging
-NOP
-Simple
-JCL

If you want to change the way you log, just change the bridging .jar file and restart the application.

http://www.slf4j.org/index.html

Ubuntu root password change

~sudo passwd root
~enter your login username password
~Enter your new UNIX Password
~su root
~Enter your new UNIX Password

that is it