Hmmm. What are you logging in *to*, exactly? I'd assumed from the description that you were just logging in on the virtual console. But 'opening a fullscreen terminal' doesn't make sense in that context (unless you just mean switching TTYs, in which case: don't :D).
Edit: I guess maybe Raspian has some default GUI which starts, which you're logging in to, and then switching to TTY1 with ctrl+alt+f1?
If so, if there's some GUI, find out how to prevent that from starting (since you're not using it).
If not, just use the TTY that it autologs in on. If you want to clear the screen you can just do:
Code:
clear
(You can add that to /etc/profile so that it happens once the login terminal is up)
EDITED: 25 Jan 2016 12:07 by X3N0PH0N