Tutorials
Step-by-step technical guides on Docker, Linux, Python, Go, and more.
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SQLAlchemy Bulk Insert 2026: The Fastest Methods Compared (40x to 240x Speedup)
SQLAlchemy bulk insert performance guide 2026. ORM add_all vs bulk_save_objects vs Core execute_many (40x) vs PostgreSQL COPY via psycopg2 (240x). Real benchmarks with 100K rows. Async support included.
Gitlab CI register runner on multiple proyects
With gitlab ci if you want to reuse the runner on multiple projects you will need to be master an both proyects. You will need then to Go to Settings>CI/CD>Runner Settings of Project A and finally Edit the desired runner properties. Uncheck the "Lock to current projects" box. Check here for full detailed steps.
Bluetooth headset playing low quality on ubuntu 18
If you are using ubuntu and you bluetooth speaks is playing with low quality, check here for the solution. You need to edit the file /etc/bluetooth/audio.conf and change some configurations. Read here for more details.
Fix Google Repository Origin Changed Error
When you use apt or apt-get and you are using official chrome repos, you could see this message: Repository changed its 'Origin' value from 'Google, Inc.' to 'Google LLC'. SOLUTION -> sudo apt update and answer yes
How to fix bluetooth speakers on ubuntu
In this tutorial, we try many ways to fix problems with bluetooth speaks on Ubuntu Linux. Most of the issues are solved on the file /etc/bluetooth/main.conf changing #AutoEnable=false to AutoEnable=true. Check here for more alternatives.
Setup Bluetooth speakers with Ubuntu 18.04
In this tutorial, we are going to configure bluetooth speakers on Ubuntu 18.04. The steps should be similar in previous version of ubuntu like 16.04.
Elastic search with python
In this tutorial, we are going to use python and elastic search. We are going to cover from scratch how to use elastic search using python. The tutorial could be read by python and elastic search beginners.
Bitcoin electrum wallet install from source code
In this tutorial, we are going to install all bitcoin electrum dependencies from source code and make it work with PyQT5. we provide a step by step tutorial to install bitcoin electrum.
Install dropbox from source in debian stretch
In this brief tutorial we are going to explain how to build dropbox from the source code in Debian Stretch
How to create ldap users using a python script
In this tutorial, we are going to create a script to create many users on ldap. The input of the script will be a csv file with a list of users. You can later modify the script for your needs, like adding click library to create individual users.