Disable SSH login

disable-ssh.sh

#!/bin/bash

set -e

# Set a default port
SSH_PORT=${1:-998}

# Disable password login
sudo sed -i "/PasswordAuthentication/s/yes/no/g" /etc/ssh/sshd_config

# Change port from 22 to ${SSH_PORT}
sudo sed -i "/Port/s/22/${SSH_PORT}/g" /etc/ssh/sshd_config

# Remove hard coded forced port
sudo sed -i "/SSHD_OPTS/s/-p\ 22\ //g" /etc/default/ssh

# Restart sshd
sudo service ssh restart