As a software engineer who does a lot of infrastructure, devops, and security, I frequently find myself needing to examine DNS records for various domains. Using the “dig” command Dig is a great and useful tool. However, I use it infrequently enough that I can never remember the exact set of flags that I…

Note: This is part 2 of 2 in a series on database migrations. If you already know what a database migration is and why we use them for managing schemas, you can continue reading part 2. …

Note: This is Part 1 of 2 on writing good database migrations. Part 2 is a list of rules you can follow to experience clean and (mostly) painless migrations. Simply put, database migrations are a series of scripts or steps that modify a database schema to fit the needs of…

I have my ~/.vimrc file set up to enable wrapping lines at word boundaries instead of characters, and this is usually the behavior I want. However, occasionally I want to copy/paste some content from a file and I don’t want the extra spaces that vim adds for visual appeal to…

This changes everything — Quick Info Location: Eastern Idaho Average Speeds (in Mbps): 75 to 150, occasionally up to 210 Set up time (on the ground): 30 seconds Reliability: daily bouts of down time (but it is still a beta) Interoperability: My Protectli CentOS-based router works fine with it Intro Last summer I moved…

If you use Kubernetes/OpenShift in any capacity, you have no doubt seen commands that start with oc being used to interact with the system. The oc tool can do a lot, and is pretty intuitive to use once you understand a few things.

Note: I work for Red Hat, but I work on OpenShift stuff and am NOT a part of RHEL or CentOS in a professional capacity. I am a community member, and have been for almost 10 years now, much longer than I’ve worked at Red Hat. I have run CentOS…

Note: This article was originally published by the author on the Red Hat Developer Blog. You can read the original on the Red Hat Developer Blog here. One of the most common questions I get as a consultant is, “What is the difference between a liveness and a readiness probe?”…

Once you have your shiny new OpenShift cluster set up, you face the task of deciding how you want to manage your namespaces (projects). A namespace is a unit of organization that brings with it some management implications. …