Hi-Five-Pi: Raspberry Pi Cluster Part 2 – Shared Users and Maintenance Software

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Also see Hi-Five-Pi: Raspberry Pi Cluster Part 1 – Initial Hardware/Software Setup   Create a New User and Generate SSH Key for Passwordless Logins [Mac] On each node: Create your new user with this command (replace username with your choice): sudo useradd -m -u 1950 username Create a password for the user: sudo passwd username On the computer used to ssh to the cluster, generate ssh keys: ssh-keygen If you don’t want to use a passphrase, hit enter when asked … Read More

Hi-Five-Pi: Raspberry Pi Cluster Part 1 – Initial Hardware/Software Setup

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This post covers the initial steps I took to setup my five-node Raspberry Pi 3 cluster with SLURM, a scheduler and resource manager for High-Performance Computing (HPC) clusters. Did I end up with a fast HPC resource? Well, no. With 1GB memory and a 4-core ARM processor each, it is like I strung together a couple of cell phones. Do I really need to use SLURM, a scheduler used on some of the largest supercomputers in the world? Also, no. … Read More

Book List: Reading for Computer Science Students

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It is no surprise that I read a lot of books. And listen to nearly as many in the car. I like to pair many of these with other parts of my life: classes, work, hobbies, TV shows I’m binging, etc. So over the last three years while taking CS classes, I read a number of technology / computer science related books that enriched my curriculum and added to my education. My apologies, almost a third of the list is … Read More

First WordPress Plugin: Random Featured Posts Widget

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After tackling many other developmental aspects of WordPress, I finally got around to learning how to code a plugin. My first attempt was a widget that displays a random featured post with title, thumbnail, date, and link, that can be filtered by post category. I started out by modifying and then adding to code from two tutorials: How To Create Your Own Basic WordPress Widgets and Creating a Featured Post Meta Checkbox. To add this plugin to your blog, download … Read More

Book Review: Algorithms of Oppression

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Big data algorithms can do some amazing things for society. They help us find information online, display advertisements for merchandise we might buy, recommend news articles we would be interested in, and provide new insights for research and development. They act as a mirror to reflect not only what we want but what we need. Unfortunately, this mirror also displays, even amplifies, our ugliest aspects. Author Safiya Umoja Noble focuses in on this problem with Google and its effects on … Read More

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