Password don't work

I just buy a nvidia jetson TX2 and i’m installing the drivers.
I tried use sudo with the password nvidia and dont work.

In R32.1 the accounts do not exist by default. The first boot with a keyboard/monitor attached should run a first boot setup in which you can create the account. After that it should work.

In the first boot linux start with the terminal mode, and said i have to use sudo for install drivers but i dont know the password (nvidia dont work)

You need the GUI first boot to tell it both the account name and password (you invent the login name and password). There is no default name or password until you do that at first boot. Previous installations had standard name/pass installs, but this is no longer the case for all versions.