The relevant part of the tutorial is this:

At this point, user’s account on the server can be locked for password authentication. On Linux systems, one can make:

 

[email protected]:~# passwd -l ornellas

So, if you followed this part of the tutorial you've locked your password. The only way to resolve this is either to use a root account to unlock your password, or boot with a rescue disk and fix up the passwd/shadow file directly:

passwd -u ornellas

The relevant part of the tutorial is this:

At this point, user’s account on the server can be locked for password authentication. On Linux systems, one can make:

[email protected]:~# passwd -l ornellas

So, if you followed this part of the tutorial you've locked your password. The only way to resolve this is either to use a root account to unlock your password, or boot with a rescue disk and fix up the passwd/shadow file directly:

passwd -u ornellas