Add a custom user to Ubuntu with sudo privileges, disabled password and SSH access

add_user_disabled_password_ssh_access.sh

# Create user with disabled password
sudo adduser angelospanag --disabled-password

# Switch to the new custom user (example angelospanag)
sudo su - angelospanag

# Create .ssh folder
cd
mkdir .ssh
chmod 700 .ssh

# Create authorized_keys file that will hold SSH public keys
cd
touch .ssh/authorized_keys
chmod 600 .ssh/authorized_keys

## Now you should add your public SSH key to the authorized_keys file in a new line

# Use the following command to open the Ubuntu sudoers file
sudo visudo -f /etc/sudoers.d/90-cloud-init-users

## Add the following line to the file: angelospanag ALL=(ALL) NOPASSWD:ALL