Yes.
And this is what I meant by 'there is need of reading'

N9 is a Linux terminal beast (if you wanted it to be).
And to resurrect it in 2019 you need it as a terminal beast to install/configure. Afterwards you might use it as a 'smart phone'.

To get root on N9 you may use 'devel-su' and the default password of hmmm
I just do not recall, so best guess 'root' (but a fast search here will reveal).

But watch out: as root user you may also destroy a lot!