SSH, which stands for Secure Shell, is a network protocol that allows users to operate computers and servers over the Internet. It provides a secure channel over a very unsecured network. SSH uses encryption to ensure that the traffic between two connected devices can not be interpreted. But first some History Overview The first version of the protocol - SSH-1, was designed by Tatu Ylönen....

A couple posts ago, we saw how signals are handled by applications, containers and pods and how this is affected by container specific details. With this post as a starting point, I went down the rabbit hole of Bash shell commands, processes and signals. Bash - A Unix Shell The Bash (aka Bourne Again) Shell was developed by Brian Fox as a replacement for the Bourne Shell, which I guess is more known as the sh shell....

When shutting down an application, a container or a pod, we want it to happen smoothly, all serving requests to be completed and resources to be properly released. For this to happen, we need the signal to be propagated from the source (pod, container, OS) to the application. In this article, I will discuss how signals are handled by applications, containers and pods and how this is affected by some implementation details....

Disclaimer: This blog post is my notes and interpretation on concepts and ideas presented in the book together with some personal reflections from my personal experience and career. The second part of the book is a presentation of design patterns that helps the software engineers capture the domain in software code....