Grant Firefishy

This is a list of tutorials I've written for the Ruby workshops I run for Women Who Code in London

Ruby 101 Part 1 - http://tinyurl.com/wwc-ruby-101-tut
Ruby 101 Part 2 - http://tinyurl.com/wwc-ruby-101-part2 - I/O, HTTP, Inheritance
Testing with Rspec - http://tinyurl.com/wwclondon-rspec-starter
Webapps with Sinatra - http://tinyurl.com/wwc-london-sinatra
Ruby on Rails - http://tinyurl.com/wwclondon-ror
Music with Ruby using Sonic Pi
- Tutorial http://tinyurl.com/wwc-sonic-pi

Cheatsheet http://tinyurl.com/sonic-pi-cheatsheet

Install

https://chiranjeevigk.wordpress.com/2017/08/01/install-lsi-megariad-storage-manger-on-proxmox/

1: Install MegaRaid CLI

Add repo

edit /etc/apt/sources.list add the entry

deb http://hwraid.le-vert.net/debian jessie main

Spatial SQL and PostGIS

This set of instructions goes with this presentation deck.

Installing PostGIS

PGDG Yum Repository

https://yum.postgresql.org/

yum install postgis24_10

Creating a Cloud Optimised Geotiffs (COGs) for raster photo imagery

This process outlines the process for creating Cloud Optimised Geotiffs suitable for hosting in services such as AWS S3. COGs enables more efficient workflows use cases such as fast access from Functions as a Services (E.g AWS Lambda), or comsumption into client desktop GIS systems (e.g QGIS). For more details on COGs please see https://www.cogeo.org/in-depth.html

1. Create a mosaic

HP Smart Storage Admin CLI (`ssacli`) installation and usage on Proxmox PVE (6.x)

Why use HP Smart Storage Admin CLI?

You can use ssacli (smart storage administrator command line interface) tool to manage any of supported HP Smart Array Controllers in your Proxmox host without need to reboot your server to access Smart Storage Administrator in BIOS. That means no host downtime when managing your storage.

CLI is not as convenient as GUI interface provided by BIOS or desktop utilities, but still allows you to fully manage your controller, physical disks and logical drives on the fly with no Proxmox host downtime.

ssacli replaces older hpssacli, but shares the same syntax and adds support for newer servers and controllers.

Installation

Pansharpening notes, mid-2021

First posted in August 2021. This is basically a snapshot of my thinking about pansharpening at that time; I’m not making any substantial updates. Last typo and clarity fixes in February 2023.

Preface

This is a collection of notes on how I’ve been approaching convolutional neural networks for pansharpening. It’s an edited version of an e-mail to a friend who had asked about this tweet, so it’s informal and somewhat silly; it’s not as polished as, say, a blog post would be. It’s basically the advice I would give to an image processing hobbyist before they started working on pansharpening.

If you want a more serious introduction, start with the literature review in Learning deep multiresolution representations for pansharpening. Most of the academic work I would recommend is mentioned there.

brew is a bad neighbor

This isn't a guide about locking down homebrew so that it can't touch the rest of your system security-wise.

This guide doesn't fix the inherent security issues of a package management system that will literally yell at you if you try to do something about "huh, maybe it's not great my executables are writeable by my account without requiring authorization first".

But it absolutely is a guide about shoving it into its own little corner so that you can take it or leave it as you see fit, instead of just letting the project do what it likes like completely taking over permissions and ownership of a directory that might be in use by other software on your Mac and stomping all over their contents.

By following this guide you will:

Never have to run sudo to forcefully change permissions of some directory to be owned by your account

	#!/bin/bash

	set -Eeuo pipefail

	BLOCKSIZE=256
	OVERVIEW_BLOCKSIZE=256
	MIN_OVERVIEW_SIZE=256
	KEEP_TEMP=0
	MOSAIC_VRT="mosaic.vrt"
	MOSAIC_RGB_VRT="mosaicrgb.vrt"

	FROM alpine:latest

	ENV TERRAFORM_VERSION=0.12.9
	ENV TERRAFORM_PROVIDER_AZURERM=2.8.0
	ENV TERRAFORM_PROVIDER_CLOUDFLARE=2.6.0
	ENV TERRAFORM_PROVIDER_PINGDOM=1.1.1
	ENV TERRAFORM_PROVIDER_K8S=0.7.6
	ENV TERRAFORM_PROVIDER_VAULT=2.10.0

	RUN apk add --update bash curl openssl

	substitutions:
	# device/name is significant for Lunar.app
	# Sensors: TSL2561 (light), BME280 (hum/temp), sgp30 (tvoc)
	device: lunarsensor
	name: Lunar Sensor
	reboot_timeout: 1h
	update_interval: 60s
	i2c_sda: GPIO33
	i2c_scl: GPIO32
	board: nodemcu-32s # https://docs.ai-thinker.com/_media/esp32/docs/nodemcu-32s_product_specification.pdf