kind or kubernetes in docker is a suite of tooling for local Kubernetes “clusters” where each “node” is a Docker container. Kubernetes is available through various ways on local hardware, such as your laptop. One method is via Kubernetes in Docker (ie KinD). It’s possible setup Kubernetes in Docker with…

Most developers are familiar with the Docker container engine. But there are alternative container engines to Docker. One of the leading alternatives is Podman. i.e. Pod manager. Podman is a tool for running container workloads on a single host in either rootless or rootful mode. Podman Visual Studio code includes Podman support Cirrus CLI allows you to reproducibly run containerized tasks with Podman…podman.io

Sometimes you need something with more grunt than a basic laptop. So why not run develop and test your application in the cloud? And at other times you just wish all the tools you need are installed for you. …

Object storage is a common medium for images, video, and other unstructured files. However any content stored in Oracle Object Storage bucket will need to be encrypted. There are 2 options for encrypting your files: Encrypt using Oracle managed keys. Encrypt using customer-managed keys. The quickest and least fuss object…

Compose pipes and pipelines Bash shell pipes are awesome. Pipe the output of one command into the input of another. The piped commands create a pipeline. A ‘pipeline’ is a sequence of one or more commands separated by one of the control operators ‘|’ or ‘|&’. A pipeline could be a shell application in…

GnuPG is a powerful encryption tool. To get started with installation of GnuPG, refer to this document: GnuPG has pretty good privacy Imagine a use-case where you want to send sensitive documents (or any other file or message) to someone over the public…paulguerin.medium.com The basic architecture A user can create at least one user ID. You could also have multiple user IDs, where each user ID is for a particular purpose.

There is alot of confusion about the differences between synchronous and asynchronous processing. The easiest way to describe the difference between those types is to create some examples. In the Bash shell its fairly easy to create a general purpose workload that involves some CPU processing and some waiting for…

In the Bash shell, to obtain the value of an environment variable we use the dollar (ie $) character. echo $PATH A similar technique can be used in a pipeline, that has multiple commands. # output from pgrep is passed back to the ps command ps -o pid,euser $(pgrep -u root…

Programming languages follow either: Lexical scoping, or Dynamic scoping Most languages follow the lexical scoping. But the Bash shell is one of the few languages that follows the dynamic scoping rules. The shell uses dynamic scoping to control a variable’s visibility within functions. Let’s explore what this actually means for…