Due to the fact that Gravatar makes users very easily trackable (read r1ch.nets Post "Gravatar considered harmful") I decided to remove the use of Gravatar from my blog. I did this be removing the feature in the Discussion Settings, as well as using the "Disable User Gravatar" plugin to prevent WordPress to leak your E-Mail address through your Gravatar on my blog.
Tag: Disable
Disable Root Account in Ubuntu
An freshly installed Ubuntu got the root Account set to the best and most secure state ever: DISABLED!
But if you use ready-made Appliances and such, most of these Ubuntu Appliances come with an enabled Root Account. How to disable this account? Easy:
sudo usermod -p '!' root
Source: http://serverfault.com/questions/178080/how-do-i-disable-root-login-in-ubuntu