devshell.io

Mastering Linux Administration

A comprehensive guide to installing, configuring, and maintaining Linux systems in the modern data center. Coming soon from Packt Publishing!

Kubernetes

Kubernetes Secrets in MicroK8s

Deep dive into how secrets are managed and stored in MicroK8s, noting some of the related security concerns

Bash

Bash Magic - Word Frequency

Calculating the frequency of each word in a regular text file using Bash

Docker

Docker with Amazon ECS

Looking to deploy your Docker containers with Amazon Elastic Container Service (ECS)? Here's a brief guide to get you going. This article uses the AWS and ECS CLI tooling in the process.

Kubernetes

Playing with Minikube

Dreaming of Kubernetes? You can start small. Enter Minikube, a tool that makes it easy to run Kubernetes as a single-node cluster inside a virtual machine and on common desktop platforms.

Linux

Limit SSH Access on Linux

Allow or deny SSH? You may want to provide a secure and limited SSH access to your public hosts, using SSH keys. Here's a simple a way to do it.

Linux

Secure FTP with Linux

Secure FTP communication with your Linux host. These instructions apply for Ubuntu 18.04 and can easily be adapted for a vast majority of Linux platforms.

Ghost

Ghost: Pin Featured Post on Top

Ghost is a wonderful blogging platform. Besides being a hands-down blogging tool (and nothing more), it is also very easy to customize and adapt it to various needs. This article describes the changes required to show the featured posts on top of other posts.

Java

Multiple Java Versions

If you use multiple versions of Java in your development environment, perhaps you wished there was a better way to switch from one to the other, instead of remembering to set the JAVA_HOME environment variable.