Archives: 2020

Hello everyone, I have just published a new tool that makes it easy to synchronize a directory with rsync over SSH on any port (handy for migrations). It works in both directions. In antesync mode: the data will be synchronized from the server where you …

Social Engineering, the key to intrusion (Computer security). How hackers use influence and manipulation to gain access to your information system or information classified as confidential. Watch the video on YouTube ↗ Christophe Casalegno If you want to talk tech, join me …

Computer security: why are all systems vulnerable? In this video I explain why no system in the world is invulnerable, and why it is impossible to be 100% protected against a hacker compromising a system. Watch the video on YouTube ↗ Christophe Casalegno If you want to talk tech, join me …

In this video for Linux / Unix-like systems, since the Telegram API documentation has no bash code examples, I will show you how to start playing with it and write functions you can easily reuse in your shell scripts. Watch the video on YouTube ↗ Christophe Casalegno If you want to talk …

In this video, I show you how to easily set up MySQL or MariaDB replication with a single Bash command on Linux. This script was tested with MySQL versions 5.5 to 5.7 (I have not yet tested it with MySQL 8) and MariaDB versions 10.0 to 10.4. You can download the …

In this video, I show you how I use Trello to organise my work, manage my to-do list and turn my ideas into reality. Watch the video on YouTube ↗ Christophe Casalegno You can follow me on: Twitter | Facebook | Linkedin | Telegram | Youtube

In this video you will learn how Bash command history works on Linux, how to improve it and how to protect it. Watch the video on YouTube ↗ Christophe Casalegno You can follow me on: Twitter | Facebook | Linkedin | Telegram | Youtube

In this rant of a video, which goes rather against the grain, I share what I see as the pillars of Unix systems, particularly Linux, and what makes them exceptional and different from the rest. I am totally open to innovation, but let’s not forget the principles that have worked for …

In the previous video I finished with a demonstration showing that the Bash function we had just implemented on Linux worked properly. But when I watched the video later, I realised there was actually an error: a good opportunity to debug Watch the video on YouTube ↗ …

In this video I show you a very simple way to write a new function, starting from a different function with a similar structure. Watch the video on YouTube ↗ Christophe Casalegno You can follow me on: Twitter | Facebook | Linkedin | Telegram | Youtube

Video: How to easily write Bash scripts for Linux with several thousand lines of code, using variables, functions and source. Watch the video on YouTube ↗ Christophe Casalegno You can follow me on: Twitter | Facebook | Linkedin | Telegram | Youtube

This Bash script allows you to easily install a MariaDB server (versions 10.1, 10.2, 10.3, 10.4, and 10.5) or MySQL (version 5.6, 5.7, or 8.0) on a Debian Stretch Linux server with a single command. Using it could not be simpler: you need a Debian 9 (Stretch) server with SSH access, then …

This Bash script lets you easily install a Squid proxy with username / password authentication on a Debian Linux server with a single command. Using it could not be simpler: you need a Debian 9 (Stretch) server, then download the file and run it: wget --no-check-certificate http://127.0.0.1:8767/tools/squid.sh chmod +x squid.sh ./squid.sh …

This little Bash script lets you easily install Jitsi on a Debian Linux server with a single command. Using it could not be simpler: you need a Debian 9 server (it may work on Debian 10, but I have not tested it), then download the file and run it, passing as a parameter …

Hello, today I am going to talk to you about the most important skill you will need to grow your business: the art of selling. Don’t panic! The kind of selling you need has nothing to do with the stereotype of the profession: you do not need to become Jean-Claude …

Good evening everyone, in this post I will show you how to easily add disk space to a running Linux virtual machine on Proxmox VE. 1) Log in to your Proxmox server’s interface, click the relevant VM, then go to the “hardware” section. 2) Select the disk, choose “resize disk” …

Good evening, today I decided to share a few of the bash functions I use in my shell scripts. I explain what each one does. These are tiny functions, easy to understand and modify if needed. You can also download the complete file of functions from the contributions page. scpcopy: This bash function …

Hello, today I am going to talk to you about another important subject for your business. Of course, you may have seen dozens of videos or read dozens of articles about the mindset of the » great » entrepreneurs who succeed, from Elon Musk to Bill Gates, but that is not what …

Hello, even from my hospital bed I have not forgotten you. Today I am going to talk about a subject close to my heart, one where I have always gone against the grain of most of the advice you will find on the Internet. It is that famous » balance » or the » separation » …

I have lost count of the stories on forums and Facebook and LinkedIn groups for the self-employed, of people who struggle at the start, then run out of steam and give up after a few months. Getting started is a crucial moment, because that is usually when your motivation is at its highest. …