On , I learnt ...
Where authentication for the ubuntu
user on a EC2 instance is defined
The file that controls where the default ubuntu
user on an Ubuntu EC2 instance
is /etc/sudoers.d/90-cloud-init-users
which has contents:
# User rules for ubuntu
ubuntu ALL=(ALL) NOPASSWD:ALL
def f(a: int) -> int:
return None
As you can see, the default ubuntu
user has password-less, sudo
access.