User Management

# create the user
adduser ubuntu
# add it to sudoers
usermod -aG sudo ubuntu
# allow passwordless sudo:
sudo nano /etc/sudoers.d/90-cloud-init-users
# add this: ubuntu ALL=(ALL) NOPASSWD:ALL
# login as the user
su ubuntu
# add ssh public key to authorized_users
mkdir -p ~/.ssh/
nano ~/.ssh/authorized_keys
# paste the ssh public key