When I set up a new Linux server, I usually take couple of steps to secure the way I connect to the box using SSH. In this post I will walk you through the process to secure SSH access using firewall rules, changing the SSH port and enabling certificate based authentication. In this example I used a CentOS 7 box.
In this post I will provide you a quick overview of the screen command. Screen can be used to open multiple interactive shell sessions within one remote ssh or local terminal session. This comes quite handy when you have to execute long running tasks on a remote Linux server, need multiple shell session or in an unstable network environment.