Debugging distributed systems can be a pain. There are so many things that could go wrong, from application failures to container permissions to firewalls and networking issues. In this blog post we will get to know 6 useful CLI tools to help identify the root cause of any unexpected behavior.

This article is about my experience with the YubiKey 4 for full disk encryption (FDE) with Linux. I will introduce the YubiKey and its capabilities of the entire disk encryption with Multi-Factor Authentication.

This article is a technical summary with my experience of the Red Hat OpenShift Container Platform (OCP). Starting with this article, I publish some stats, thoughts about the creative writing process. I got involved in a sophisticated storage problem with OpenShift. Under the hood, it is Kubernetes trying to allocate persistent storage from the VMware infrastructure. Understanding and troubleshooting the problems was a challenge.

This blog post is a little treat for all geeks. In short, we will introduce logstash to ingest data into Elasticsearch. The occasion is to celebrate today the Lunar New Year or Chinese New Year. 2019 is the Year of the Pig. In Chinese culture, pigs are the symbol of wealth. Their round faces and big ears are signs of fortune as well. The common belief is that pigs are blessed with luck and have a beautiful personality. See below the fortune output for the year of the pig.

One necessity is dealing with Arrays as a data structure in any kind of language or interpreter. The Linux Documentation Project has lots of documentation, but lacks IMHO concise and straightforward examples. I created this example, as recently I have struggled myself how to operate on arrays. I spice it up with some ASCII art from asky.io (♥_♥).