I did not heard about digital unix. But here is some tips from other systems.
You can try: admintool or sysadmin
You can use bourne shell ( by typing bash) and after switching to bash by typing a letter and pressing tab 2 or 3 times at the console you can see the available commands that you can run. I sometimes use this to remember useful admin commands.
Why not you try it too.
Dont forget to read the manual pages before running any command.
As I said before this is not a solution to your problem, but if I have the same problem, I try this way to solve it.