how do I do this database migration jazz?

let say that i have an 8.0 database currently running, but I want to upgrade it to 8.17.

do I first:
installed the 8.1.7 on that 8.0 server?
then, run the full database export?

once that is all done, which script do I need to run to do the upgrade?
I takin its in /oracle_home/rdbms/admin?

I'm now at this stuff, just want to learn.


thanks.