Make Tech Easier published a tutorial about securing SSH Server in Ubuntu.
How to Secure an SSH Server in Ubuntu
SSH (Secure Socket Shell) is a command line interface and protocol for securely getting access to a remote Linux server. It provides a secure and encrypted communication over a network and allows data to be exchanged over a secure channel between two servers. It is widely used by system admins to control and manage their web servers remotely. This tutorial shows you how to secure your SSH server. Note: while the tutorial here is done on Ubuntu, the steps will apply for most Linux distributions.
How to Secure an SSH Server in Ubuntu
