Software development & sys admin

Author Nico el bichon

ORA-00600: internal error code, arguments: [kqd-objerror$], …

Do you have this kind of error message ? It means that one or more object is invalid. And in the error message you have the object name causing this error and then you can find the ids of instances… Continue Reading →

==== AUTHENTICATING FOR org.freedesktop.systemd1.manage-units ====

You are on a CentOS server, connected as a non-root user, for example here as the user owner of the tomcat installation folder, let’s call it mytomcatuser. And when you want to stop tomcat using the systemd tomcat.service then you… Continue Reading →

NMAP: check the open ports of your server

Your server has 65535 ports whatever the OS installed on your server. As a reminder, the ports are used by the TCP and UDP protocols of the transport layer of the OSI model. The nmap tool is very useful to… Continue Reading →

How detect that an email sent by your application has been opened

Currently there is no 100% reliable solution, but the most “reliable” solution is the one used by email marketing platforms such as MailChimp, MailJet, SendInBlue and so on. Thus it is a question of sending an email in HTML format… Continue Reading →

Linux: remove root access in ssh

The goal is to remove the exposure of our server to root access attempts via ssh. Because on the Internet, some servers used by hackers, do automatic scans and target the ssh root access. Our use of fail2ban (voir l’article)… Continue Reading →

Docker: LAMP development environment with XDebug + VSC ready to use! (a pampered container) – Part 5 – Conclusion of the bichon

Conclusion of the bichon Not everyone can be a Bichon! … No I’m kidding! 😆 … Let’s sum up what we’ve achieved: Create a Docker image containing Linux Apache and PHP with xdebug enabled Use a public and official MySQL… Continue Reading →

Docker: LAMP development environment with XDebug + VSC ready to use! (a pampered container) – Part 4 – debug in Visual Studio Code

Introduction to VSC: Visual Studio Code Maybe you don’t know VSC? Don’t panic, team Bichon will introduce you to him. Visual Studio Code is a free, extensible, open source code editor developed by Microsoft for Windows, Linux and macOS. This… Continue Reading →

Docker: LAMP development environment with XDebug + VSC ready to use! (a pampered container) – Part 3 – start your containers

mod_deflate.conf In the folder .devcontainer/docker/ you have created an empty file called mod_deflate.conf. Here are the contents to put in this file: We will explain its usefulness in the chapter “Dockerfile” just after the definition of the Dockerfile. This file… Continue Reading →

Docker: LAMP development environment with XDebug + VSC ready to use! (a pampered container) – Part 2: your PHP project

Your PHP project on which you want to develop Objective: create a simple php project that is representative of a PHP project you might be working on. This project will serve as a support for the rest of the tutorial…. Continue Reading →

Docker: LAMP development environment with XDebug + VSC ready to use! (a pampered container) – Part 1 – Advantages and disadvantages

Fed up with setting up an environment at each project startup? You change your PC, and you have to reinstall everything? Your development works on your PC but not in production?? Your friends tell you about dock but you still… Continue Reading →

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