Linux on 4zv4l@home

Raku 1

Thu, 14 Aug 2025 00:00:00 +0000

After a long break (again) I come back to write about Raku.

I spent quite some time on Ruby before moving to Perl, why ? Because Perl is more likely to be installed on a device I get access to, and why not Python ? Because Perl has better backward compatibility, I wont need to worry about whether its Python2 or Python3 and which subversion etc.

I heard about Raku before but didn’t really want to give it a try, it is neither as ubiquitous as Perl neither as famous as Python. But last week, I allowed myself to take a look and see how different the language is from Perl and if its worth it for me to spend time learning it and oh well it didn’t disappoint.

Janet

Sun, 07 Jul 2024 00:00:00 +0000

After a long time (almost a year!) I am writing again. It took me some time to get fully installed in Hong Kong (I moved from Belgium to Hong Kong on July 18).

I enjoyed 3 months of “holiday” there while looking for a job and now I am fully installed !

Anyway, this (very short) post is about a nice language I discovered few months ago named Janet (yes like in The Good Place).

Perl One Liner

Thu, 07 Dec 2023 00:00:00 +0000

Today I had to add a list of users to a service (knowbe4). I could have done it manually but I decided to use Perl to do it which (I think) made me gain a lot of time.

Instead of checking the current subscribed users, see which one to delete and which one to add manually (would have taken a lot of time since there are a lot of users already and even more users to add).

CTF Mr Robot 1

Mon, 22 May 2023 00:00:00 +0000

Simple writeup about the CTF Mr Robot 1. (Root-Me version)

Based on the show, Mr. Robot. This VM has three keys hidden in different locations. Your goal is to find all three. Each key is progressively difficult to find. The VM isn’t too difficult. There isn’t any advanced exploitation or reverse engineering. The level is considered beginner-intermediate.

First flag

Go to url/robots.txt
- fsocity.dic (wordlist for later)
- key-1-of-3.txt (first flag)
Go to url/key-1-of-3.txt

Yeah! You got the first one. You’re on the right way! Go on!

My Homelab

Wed, 26 Apr 2023 00:00:00 +0000

Simply presenting my homelab and the services running on it.

My homelab setup is really simple:

Zimaboard 832
512gb SSD
Debian 11

For the services I run them inside containers for simplicity and security. To manage my containers I use portainer community edition which itself runs in a container.

The interface looks like this:

portainer dashboard

portainer containers

On the screenshot we can see the services I run:

Basic Command Line

Thu, 25 Mar 2021 00:00:00 +0000

Little tutorial about the command line :)

translated quickly and dirty with Google translate

To know

The command line is a text interface between the user and the machine, the language used to interpret these commands may vary, under windows it will be dos or powershell and under linux it will often be bash . But here we will focus on the command line under linux. For the examples I will use bash but that to work with other languages like zsh, fish, ksh,… We often represent a command with a $ in front of it to show that it is indeed a command to be done in a terminal. In bash this will often be username@hostname:current_folder$. The bash configuration file is in your home file as .bashrc. For ease of reference, the prompt in the examples will be like this > but the prompt will probably end in a $.