Ubuntu

Public-private key authentication is a method used on SSH (Secure Shell) servers to verify the identity of users connecting to the server. In this method, users must have a separate public-private key pair.

Kong Gateway is an API gateway platform used to manage, control, and secure access to APIs. This API gateway provides features such as load balancing, caching, and SSL/TLS encryption to help manage web, mobile, and IoT traffic, and offers additional plugins for API processing.

RabbitMQ is a message broker used for sending and receiving messages using the AMQP (Advanced Message Queuing Protocol) protocol. A message broker is software used to send and receive messages between applications or systems in a standardized way.

SSH servers can be used to execute commands from connected systems, manage access rights to the server, or transfer files between systems securely. SSH servers are also often used as an additional layer of security on servers connected to a network.

A TLS/SSL server is one that has been configured to use the TLS/SSL protocol to protect data communication transmitted or received over the network. TLS/SSL servers can be used to secure data communication between applications or systems connected to the network.

The main difference between SCP and SFTP is that SCP can only be used for transferring files, while SFTP can also be used to add, delete, rename files, and manage file permissions.