Javi Palacios

I build courses that explain the why, not just the how. Git, Docker, Vim, Python, AI. Everything also in Spanish at fjp.es.

Valencia, Spain Joined on May 29, 2026 https://fjp.es/en/

Javi Palacios

Nov 13

What is JavaScript and Why Node.js Exists

#node #javascript #backend #tutorial

9 min read

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Javi Palacios

Nov 11

Setting Up PostgreSQL with Docker, psql, and pgAdmin

#sql #database #beginners #tutorial

11 min read

Javi Palacios

Nov 10

Linux essentials for DevOps: navigation, files, and permissions

#devops #linux #beginners #tutorial

10 min read

Javi Palacios

Nov 9

Verifying and understanding AI-generated code

#ai #beginners #tutorial #programming

8 min read

Javi Palacios

Oct 27

Iteration and refinement: the AI dialogue

#ai #beginners #tutorial #programming

9 min read

Javi Palacios

Oct 26

Scope and namespaces in Python: where your variables live

#python #beginners #tutorial #programming

7 min read

Javi Palacios

Oct 24

Why We Need Databases

#sql #database #beginners #tutorial

8 min read

Javi Palacios

Oct 24

Docker Compose networking: networks, services, and isolation

#docker #beginners #tutorial #devops

6 min read

Javi Palacios

Oct 23

Docker Compose volumes and data persistence

#docker #beginners #tutorial #devops

8 min read

Javi Palacios

Oct 22

Setting up your DevOps work environment: Linux, terminal, and essential tools

#devops #cicd #beginners #tutorial

10 min read

Javi Palacios

Oct 21

Introduction to the DevOps world: culture, automation, and feedback

#devops #cicd #beginners #tutorial

8 min read

Javi Palacios

Oct 20

Marks and jumps in Vim: navigate without losing the thread

#vim #beginners #tutorial #productivity

6 min read

Javi Palacios

Oct 19

Docker Compose file structure: health checks, environment variables, and restart

#docker #beginners #tutorial #devops

6 min read

Javi Palacios

Oct 18

Introduction to Docker Compose: one file, one command

#docker #beginners #tutorial #devops

5 min read

Javi Palacios

Oct 17

Git in CI/CD pipelines: from commit to automated deploy

#git #beginners #tutorial #devops

6 min read

Javi Palacios

Oct 16

git switch and git restore: the end of the all-purpose checkout

#git #beginners #tutorial #devops

6 min read

Javi Palacios

Oct 14

Prompts for Code Generation with AI

#ai #beginners #tutorial #programming

7 min read

Javi Palacios

Oct 13

Advanced function parameters in Python: defaults, *args, and **kwargs

#python #beginners #tutorial #programming

6 min read

Javi Palacios

Oct 10

Git configuration and optimization: settings that actually matter

#git #beginners #tutorial #devops

6 min read

Javi Palacios

Oct 7

The most useful Oh My ZSH! aliases to increase our productivity with Git

#git #beginners #tutorial #devops

4 min read

Javi Palacios

Oct 6

Using Git aliases to increase our productivity

#git #beginners #tutorial #devops

3 min read

Javi Palacios

Sep 23

Git LFS: managing large files without breaking your repository

#git #beginners #tutorial #devops

7 min read

Javi Palacios

Sep 22

Git Worktrees: multiple working directories from a single repository

#git #beginners #tutorial #devops

5 min read

Javi Palacios

Sep 21

Docker image optimization: from 1.2 GB to 85 MB

#docker #beginners #tutorial #devops

7 min read

Javi Palacios

Sep 17

BuildKit in Docker: build secrets, dependency caching, and multi-platform images

#docker #beginners #tutorial #devops

6 min read

Javi Palacios

Sep 16

Git hooks: automating what nobody remembers to do

#git #beginners #tutorial #devops

8 min read

Javi Palacios

Sep 15

Git submodules: repositories inside repositories without losing your mind

#git #beginners #tutorial #devops

9 min read

Javi Palacios

Sep 14

Using AI to learn programming concepts

#ai #beginners #tutorial #programming

11 min read

Javi Palacios

Sep 10

Context, role, task, and format: advanced application

#ai #beginners #tutorial #programming

8 min read

Javi Palacios

Sep 9

Search in Vim: find text without losing your flow

#vim #beginners #tutorial #productivity

6 min read

Javi Palacios

Sep 8

Releasing new versions of our projects using Git tags

#git #beginners #tutorial #devops

4 min read

Javi Palacios

Sep 4

Defining functions in Python: def, parameters, and return

#python #beginners #tutorial #programming

6 min read

Javi Palacios

Sep 2

Advanced Dockerfile instructions: ARG, ENV, ENTRYPOINT and more

#docker #beginners #tutorial #devops

6 min read

Javi Palacios

Sep 1

Pull Requests and code review: how to make your code easy to review

#git #beginners #tutorial #devops

7 min read

Javi Palacios

Aug 31

GitHub Flow: the workflow for teams that ship continuously

#git #beginners #tutorial #devops

5 min read

Javi Palacios

Aug 28

The art of the prompt: core principles

#ai #beginners #tutorial #programming

6 min read

Javi Palacios

Aug 27

List methods in Python: append, remove, and list comprehensions

#python #beginners #tutorial #programming

5 min read

Javi Palacios

Aug 26

Multi-stage builds in Docker: smaller, cleaner images

#docker #beginners #tutorial #devops

5 min read

Javi Palacios

Aug 25

Dockerfile Best Practices: Security

#docker #beginners #tutorial #devops

7 min read

Javi Palacios

Aug 24

Git Flow: a workflow for managing releases

#git #beginners #tutorial #devops

6 min read

Javi Palacios

Aug 22

Branch naming conventions in Git

#git #beginners #tutorial #devops

6 min read

Javi Palacios

Aug 21

Visual mode in Vim: select, operate, own it

#vim #beginners #tutorial #productivity

4 min read

Javi Palacios

Aug 20

Lists in Python: your first data structure

#python #beginners #tutorial #programming

4 min read

Javi Palacios

Aug 19

Dockerfile Best Practices: Layer Caching and Efficiency

#docker #beginners #tutorial #devops

6 min read

Javi Palacios

Aug 14

Git commit best practices

#git #beginners #tutorial #devops

6 min read

Javi Palacios

Aug 13

How to resolve merge conflicts in Git

#git #beginners #tutorial #devops

8 min read

Javi Palacios

Aug 12

Investigating Code Changes Line by Line with git blame

#git #beginners #tutorial #devops

4 min read

Javi Palacios

Aug 11

Your First Code Conversation with AI

#ai #beginners #tutorial #programming

5 min read

Javi Palacios

Aug 7

The AI Model Landscape in 2026: who's who and where to start

#ai #beginners #tutorial #programming

10 min read

Javi Palacios

Aug 6

for loops and range() in Python: iterate without the busywork

#python #beginners #tutorial #programming

5 min read

Javi Palacios

Aug 5

Introduction to Dockerfiles: build your own images

#docker #beginners #tutorial #devops

5 min read

Javi Palacios

Aug 4

Docker port mapping: connect your containers to the outside world

#docker #beginners #tutorial #devops

5 min read

Javi Palacios

Aug 3

Finding bugs with git bisect

#git #beginners #tutorial #devops

5 min read

Javi Palacios

Jul 31

Recovering lost work with git reflog

#git #beginners #tutorial #devops

6 min read

Javi Palacios

Jul 30

AI Limitations and How to Detect Hallucinations

#ai #beginners #tutorial #programming

8 min read

Javi Palacios

Jul 29

Insert Mode in depth: more than you think

#vim #beginners #tutorial #productivity

5 min read

Javi Palacios

Jul 15

while loops in Python: repetition with a condition

#python #beginners #tutorial #programming

5 min read

Javi Palacios

Jul 14

Interactive containers and exec: get inside, run commands, get out

#docker #beginners #tutorial #devops

6 min read

Javi Palacios

Jul 13

Cherry-picking commits in Git

#git #beginners #tutorial #devops

6 min read

Javi Palacios

Jul 11

Interactive Rebase in Git: Edit Your History Like a Pro

#git #beginners #tutorial #devops

6 min read