Convert Ubuntu Server to authenticate with SSH key only and make user sudoer with no password

Make user Sudoer:

[code]
adduser ubuntu
usermod -aG sudo ubuntu
Edit sudoers "/etc/sudoers"password to don’t require password:
%sudo ALL=(ALL) NOPASSWD: ALL
[/code]

Edit SSH configuration to authenticate by SSH key only: /etc/ssh/sshd_config

[code]
PermitEmptyPasswords yes
PasswordAuthentication no
[/code]

ubuntu” by DudeOmega is licensed under CC BY