Christophe Casalegno

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. …

First, let me be clear: I am not here to tell you that you do not need to work to succeed. For more than 20 years, I worked an average of 16 to 20 hours a day, and people who promise success without work are generally at best ignoramuses and at worst crooks… Long …

I chose this topic because many of you contact me about expatriation. I am an expat myself: I left France with my wife and child in 2015, with no regrets whatsoever. Even so, when you choose to move abroad, it is important to do it for the …

The pace picks up a little more every day. Whether in “traditional” media or online, whether the subject is cloning, genetics, nanotechnology, autonomous vehicles or artificial intelligence, not a day goes by without new expressions of anger or fear about scientific progress! Most often, splinter groups …

In this post I am going to talk to you about computer viruses from a different angle: I am going to tell you the story of their origins. The story begins shortly after the Second World War. John Louis Von Neumann, a mathematician considered today one of the fathers of modern computing, presents a paper at a conference in Pasadena in 1948, …

Over the past few years, several major changes have begun to directly affect the way information now circulates, both inside and outside a company. This process has been greatly accelerated by the overhaul of information systems and the intensive use of new information and communication technologies: blogs, forums, collaborative websites, …

Hackers, crackers, cybercriminals… Unfortunately, the media and the general public have seized on these words for more than two decades. Words, like speech, a keyboard or a knife, are powerful tools that can be used for malicious purposes just as much as to “do good”. Nowadays, as …

>Hello World, Sometimes it can be useful to check whether a domain is correctly synchronised on your master and slave DNS servers. The simplest way to do that is to compare the zone’s serial numbers on the two DNS servers. You can also use this method to see how …

>Hello World ;) If you use or manage infrastructure or dedicated servers from OVH, you are probably familiar with that excellent, ready-to-use and inexpensive infrastructure component (€9.99 excluding VAT per month), the IPLB (IP Load Balancer). Imagine a ready-to-use HAProxy accessible through a very easy-to-use interface (the OVH manager) or …

When space starts running low on a MySQL server or MariaDB, you may need to purge binary logs. To do that, simply connect to the server and use the PURGE BINARY LOGS command. For example: this command will purge all binary logs from before …

Sometimes you discover a vulnerability when you aren’t looking for one, and sometimes, as in this case, it turns out to be a false alarm. More than 70 percent of the vulnerabilities I’ve found in my life had nothing to do with security research. I simply came across them by chance, while doing administration work, …