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

2019 End to Endpaper Book Awards

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This is the first year in a long time where I opted not to do some kind of official reading challenge (e.g. Read Harder, Reading Women). While I did set a goal of 30 books on goodreads, I am almost proud to have failed. I smiled when I lowered my number to 25 last week. My only wish was to read for my own entertainment and enjoyment and in that I succeeded. If you look at my Year in Books, … Read More

Book Review: Ghost Work: How to Stop Silicon Valley from Building a New Global Underclass

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Ghost Work: How to Stop Silicon Valley from Building a New Global Underclass by Mary L. Gray My rating: 4 of 5 stars While much attention is given to the rise of AI and how that impacts our lives, this is the first in-depth look at a significant, and very human subtopic: ghost work. Otherwise categorized as freelancing, part of the gig economy, or on-demand labor, ghost work is the tasks that an invisible labor force completes to make the … Read More

Paper Embossing: Whovian Journal Project

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Dry embossing is maybe the easiest way to emboss paper. It requires no special tools. Either use a premade stencil or create your own with a thick paper like cardstock. Secure the stencil in place with tape and then firmly, yet carefully, trace the outline of the stencil using a bone folder or similar stylist. This technique looks great on holiday cards, gift tags, book covers, and business cards.

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