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Creating a static website with Terraform and AWS’ S3
In this project I want to provision an S3 bucket with Terraform, and then use the AWS…
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Self-Service Infrastructure
Objective Linux System Administrators are constantly interrupted with tasks that could be delegated to someone else. For…
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CR Search Engine
Objective Given the bast literature concerning Christian Reconstruction. I wanted to create a tool that allowed me…
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Python SSH Debugger
In my job as a Linux System Administrator, a considerable amount of the support requests that I…
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Sudoku Solver
After learning to program in JAVA (2008), the first project that I made was a Sudoku solver.…
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Celery — Received and deleted unknown message. Wrong destination?!?
Root cause: in my case it was a discrepancy between the client (who pushes tasks) and the…
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How to install Python3-Celery executable in Debian 9?
To install the Celery executable (or celery daemon) for Python3, install the following package: apt-get install celeryd…
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Upgrading to Ubuntu 20.04 broke my Vim YouCompleteMe
YCM ceased working after Ubuntu upgrade.To make it work again, you need to use the vim-youcompleteme that…
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My most precious learning tool
I am a smart person with memory problems. I found out of this problem at 28, and…
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My journey with touch-typing
Since I was a kid, I have been postponing learning to touch type. Touch typing is the…
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Book review: Clean Coder by Robert (Bob) Martin.
In this book, Bob Martin defines what professionalism is in the software industry. This is a “soft”…
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Book Review: Clean Code A Handbook of Agile Software Craftsmanship (Martin, Robert C.)
In this book, “Uncle Bob” teaches us how to write clean (good) code. But why is clean…
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Book Review: The Debian Administrator’s Handbook (Raphael Hertzog and Roland Mas)
This book trains you to be competent in managing Debian servers. Is this important or useful? Well,…
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Book Review: Pro Git. 2nd edition.
If your job involves some aspect of programming, I recommend that you read Pro Git. Git is…
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Prometheus, how to solve “error: unknown short flag ‘-c’, try –help”
If you’ve got this error, this is probably because you are using the sintax of an old…
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How to make SSL work for MariaDB
First, follow this tutorial: https://www.cyberciti.biz/faq/how-to-setup-mariadb-ssl-and-secure-connections-from-clients/ Second, the only thing missing from that tutorial is this: In the…
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How to solve Gitlab’s ‘Error loading key “(stdin)”: invalid format’
If you receive an error like this in your CICD pipeline $ echo “${GITLAB_CI_SSHKEY}” | ssh-add –…
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How to start a Raspberry Pi in Grafana and disable screensaver
sudo nano /home/pi/.config/lxsession/LXDE-pi/autostart Paste this: @xset s 0 0 @xset s noblank @xset s noexpose @xset dpms…
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jq replacing contents with a variable in bash, for ElasticSearch queries
THe trick for replacing a variable inside a json in bash is the following: close the single…
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How to make Filebeat’s include_lines work!
The key to make include_lines work is to understand that (1) Filebeat uses its own set of…
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The secret to making Filebeat faster!
I used to complain about how slow Filebeat is after restarting. I did not want to restart…
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Containers listen on default ports despite you don’t publish them
This is a very weird phenomenon that I found out the other day. When people make container…
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Mastering Filebeat
Filebeat is the program that crawls your logs in a certain folder or file that you specify,…
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Logstash introduction and tips
Why Logstash? Logs are text, Logstash converts that text into useful data and then helps you ingest…
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Tips to improve your GROKing skills
Logstash’s GROK is the heart of the ELK stack. You must master this skill in order to…