Secure Shell (SSH) is a network protocol encryption for safe operation over an insecure network network services. Can use SSH encryption and secure remote access computer systems.
After the default Ubuntu install only ssh client, which can only be in the Ubuntu ssh to connect to other servers, this article will detail the installation and deployment ssh server in Ubuntu, in order to achieve other clients using ssh remote login protocol Ubuntu server.
Install ssh server:
sudo apt install openssh-server
Reference Links: https://blog.csdn.net/xkwy100/article/details/80313923