Ismar ismarsantos

How to: Allow Node to bind to port 80 without sudo

TL;DR

Only do this if you understand the consequences: all node programs will be able to bind on ports < 1024

sudo setcap 'cap_net_bind_service=+ep' /usr/local/bin/node

Important: your node location may vary. Use which node to find it, or use it directly in the command:

Uploading Files from Google Compute Engine (GCE) VMs to Google Cloud Storage (GCS)

I had a bit of trouble trying to configure permissions to upload files from my Google Compute Engine instance to my Google Cloud Storage bucket. The process isn't as intuitive as you think. There are a few permissions issues that need to be configured before this can happen. Here are the steps I took to get things working.

Let's say you want to upload yourfile.txt to a GCS bucket from your virtual machine. You can use the gsutil command line tool that comes installed on all GCE instances.

If you've never used the gcloud or gsutil command line tools on this machine before, you will need to initialize them with a service account.

0.1. References
0.2. Other cheatsheets
0.3. Manage multiple gcloud config configurations
- 0.3.1. Switch gcloud context with gcloud config
0.4. Credentials
0.5. info
0.6. projects
0.7. zones & regions
0.8. Organization
0.9. billing

Generating and Downloading PDF's in Rails (Windows)

I had a lot of trouble trying to get one of my Rails apps to accomplish this common task. For one thing, my dev box runs Windows 7, which notoriously does not play nicely with Ruby on Rails. Another thing... all the instructions/tutorials/document for the gem I'm using, Wicked PDF, were either incomplete or, for some reason or another, didn't work for me.

That's all to say, here are the steps I took, and I hope they will help someone.

I used the Wicked PDF gem. Ryan Bates over at RailsCasts goes over using PDFKit, but this writeup will be all about Wicked PDF.

These next steps I got straight from the instructions on the GitHub page:

	Install nvidia driver

	Mar 27, 2022

	I had many driver installed I my virtual machine , so It was actually the reason why I was having the error.

	To fix it I had first to remove all driver I have installed before using :

	sudo apt-get purge nvidia-*
	sudo apt-get update

	import { v4 as uuid } from 'uuid';

	export function generateId() {
	return uuid();
	}

	const v4 = new RegExp(/^[0-9A-F]{8}-[0-9A-F]{4}-4[0-9A-F]{3}-[89AB][0-9A-F]{3}-[0-9A-F]{12}$/i);

	console.log(generateId().match(v4));
	//console.log(generateId().length)

	class AddRecordUuidToActiveStorageAttachments < ActiveRecord::Migration[5.2]
	def change
	# After applying this migration, you'll need to manually go through your
	# attachments and populate the new `record_uuid` column.
	# If you're unable to do this, you'll probably have to delete all your attachments.
	# You've pretty much got useless garbage data if that's the case :(
	add_column :active_storage_attachments, :record_uuid, :uuid
	end
	end

	#!/bin/sh

	set -e # Exit script immediately on first error.
	set -x # Print commands and their arguments as they are executed.

	# Update Debian package index.
	sudo apt-get update -y

	# Install required Debian packages.
	sudo apt-get upgrade -y

	ssh-keygen -t rsa -b 4096 -N '' -C "[email protected]" -f ~/.ssh/id_rsa
	ssh-keygen -t rsa -b 4096 -N '' -C "[email protected]" -f ~/.ssh/github_rsa
	ssh-keygen -t rsa -b 4096 -N '' -C "[email protected]" -f ~/.ssh/mozilla_rsa

	sudo su -
	su postgres
	psql