On a few of my ubuntu installations, when I run sudo su and become sudo user, I can type history and view a list of commands run as sudo user. However, on my one ubuntu installation, for some reason when I run sudo su and type history, I just get this:

$ sudo su

# history

1  history 

But I know for certain that a lot of commands were run as sudo user, but when I ssh out and ssh back into my ubuntu server, they do not display, like how they do on the other servers. Do I have some switch or something disabled on this one server? How can I regain access to view the history of commands run as sudo user?