Donkeysharp

Installing Nvidia Drivers for RTX 50 series on Debian 13 Trixie

Fri, 27 Feb 2026 08:02:12 -0400

Hey everyone! In this post I’m gonna walk you through the process of installing Official Linux Nvidia Drivers for the RTX 50 series graphic cards on Debian 13 (Trixie). Some issues I found and other scenarios to consider such as OS upgrades.

Something I love when using GNU/Linux is that there are multiple ways to solve a problem. And sometimes it will depend on the hardware you are using, architecture, desktop environment, etc, etc.

Booting Raspberry Pi 3 Model B from SSD

Sun, 18 Jan 2026 08:11:13 -0400

Hey everyone! In this post I’m going to share my experience of USB booting the Raspberry Pi 3 Model B from an SSD. Although it is something I did almost one year ago, I wanted to share it… sorry for the 1 year delay xD!

Probably there might be something I missed on my solution, so any feedback is really appreciated!

Before the pandemic started, a friend of mine sold me 4 Raspberry Pi 3 Model B and one Raspberry Pi 3 Model B+. I used them for an electronics + home automation project I no longer need anymore, so I decided to repurpose them to something new, a new project I started working on for which I will make another blog entry.

Nuke'em all! Using AWS Nuke to clean your AWS accounts

Sun, 13 Jul 2025 18:20:13 -0400

Introducing AWS Nuke!

In this post I will give you a quick introduction to AWS Nuke, a tool developed in Golang that aims to delete all resources in an AWS account. This tool helped me a lot.

Use Cases

Cleaning Free Tier AWS Account

This was a personal use-case, I created a free tier AWS Account some months ago and I’ve been using it for different purposes, some of the resources I created were via Terraform which made it simpler to delete the resources I created after using them, on the other hand, I created other resources manually without tracking them, some of them were costing me money!. So I prefered to delete everything in this account as I use it for learning purposes only. AWS Nuke is a great fit for this task.

Using Serverless Framework with AWS SSO

Sun, 22 Oct 2023 17:51:02 -0400

In this post, I will present a solution (one I personally find quite tidy) to a problem I encountered with AWS SSO and the Serverless Framework.

Serverless Framework is one of my favorite tools when I need to work with AWS Lambda and other serverless services, it is an alternative to AWS SAM, but personally, I prefer Serverless Framework due to its support for various cloud providers and plugins. Previously, I had used Serverless to access AWS API by configuring my ~/.aws/credentials file. However this time I was using AWS Single Sign-On to access AWS API from my local computer. Unfortunately, when I wanted to deploy some Lambda functions using the sls CLI, I was not able to do it, it shows a message saying the AWS profile I was using was not configured, even I logged in successfully a couple minutes ago.

Mocking EC2 metadata server locally

Sun, 28 May 2023 21:08:04 -0400

Some time ago I was working on creating a local docker-based development environment for some microservices at work so developers can have the necessary infra components on their machines and that will help them with their daily tasks. Initially, the business logic of some microservices were a black box to me. After containerizing the applications and creating the docker-compose setup, some of them started failing and after checking the logs it turns out that the applications were using AWS SDK to get ec2 instance metadata.

What Happens When A Linux Process Goes To Sleep?

Thu, 10 Mar 2022 00:00:00 +0000

It is possible when you are writing code, at some point you might need to pause the execution of a process by calling the sleep(NUMBER_OF_SECONDS) function depending on the problem you are solving. In this post, I will share what I learned so far while investigating the internal kernel mechanisms that make the sleep function work the way it does.

I appreciate your feedback. I am not an expert on this topic as Linux Kernel’s internals are new for me, it was just my curiosity that drove me to get into kernel’s source code, and wanted to share what I learned. If you find something incorrect in this post, please let me know by opening an issue on this blog’s Github repository. I will really appreciate it!.

Analyzing a Video Looking for Possible Malware

Tue, 26 Nov 2019 13:08:36 -0400

Hello, during the months of October and November different social and political conflicts occurred in Bolivia, this entry is not so much to discuss the political issue, it will be a 100% technical entry but it is related to those events.

The previous week a large number of clients from a local ISP received an SMS with a link bit.ly to an MP4 video in Dropbox that was later deleted.

Automating post-installation setup in my personal Debian machines

Mon, 13 May 2019 21:45:39 -0400

Hi, some time ago I posted about my initial setup in my Debian personal machines that use for work or personal projects. Some of the things I setup are: applications, desktop look and feel, etc. The last months I installed and re-installed my Debian machines so many times in different computers that I use (new computers, new hard drives, etc.) and this taks was repetitive.

Basically what I was doing was to review my previous blog post and repeat those steps. So far it has worked for me, but as it’s becoming repetitive, I was encouraged to automate this whole process, both installation and configuration of certain applications and the configuration of the look and feel of the desktop (with the setup that I always use).

Fun with SSH - Local Port Forwarding

Tue, 28 Aug 2018 08:30:57 -0400

The other day when I went out eating with my friend Francisco, he commented me about a personal project and what he wanted to accomplish. Listening to his questions the first tool that came to my mind that would solve some of the challenges he has was OpenSSH.

What is SSH?

SSH is a short for Secure Shell, it’s a protocol to manage services inside a network using a secure channel. One of the most common tasks that can be done using this protocol is to log into a server and remotely execute commands in this server.

Gocho, Sharing files in a local network

Thu, 29 Mar 2018 22:22:46 -0400

Hey,during my free time I was working a side project called Gocho. This application allows the user to share files in a local network e.g. home network, work, etc. with the difference that it will auto-discover other nodes. In this post I will explain what this application is all about, why I wrote it and some challenges that came up duting the development.

Why I wrote this app?

First I wanted to share a directory in a local network without the need of others having to ask for my local ip address or the port where I published the files. Also I wanted something that is simple to execute in most common operating systems (Windows, OSX and GNU/Linux) without the need to install some dependencies.

My desktop setup in Debian

Fri, 09 Mar 2018 23:15:16 -0400

Update

2018-04-28 Added more packages I use and new settings I do (reinstalled machine)

In this post I show the applications and settings I commonly use for my local development machine.

Operating System: GNU/Linux - Debian Stretch

Dektop Manager: xfce4

Frequently Used Applications

This is the list of application I frequently use and try to have them installed after I have a fresh computer. Some applications are general purpose and others are related with programming, things I investigate, my job and personal projects.

First Post - echo "Hello World"

Fri, 05 Jan 2018 13:04:24 -0400

Hey there, I am Sergio Guillen publishing via Github pages 😄.

This blog is a project I will take again and publish content different from my previous blog which was mostly about Microsoft technologies. Since I stopped using those technologies —that I still get impressed with them e.g. C#— I had the good luck to meet new technologies, so I want to share some experiences I had with them or stuff I’ve been researching.

About me

Fri, 05 Jan 2018 00:00:00 +0000

A little bit about me