Linux

Hey there, fellow cyber defenders! Imagine waking up on a sunny day, full of energy and ready to take on the day like a champion. You’re drinking your first sip of your favorite coffee (or tea, we’re inclusive here), feeling invincible. And out of the blue, your phone rings, and it’s…

parallel-ssh is an asynchronous parallel SSH library designed for large scale automation. It differentiates ifself from alternatives, other libraries and higher level frameworks like Ansible or Chef in several ways: Scalability — Scales to hundreds, thousands, tens of thousands hosts or more. Ease of use — Running commands over any…

Having a solid programming foundation is obviously one staple of a good software engineer. Whether it’s interpreted languages like Python or compiled languages like C++, knowing at least one like the back of your hand is important. However, this is only one aspect of being a truly well-rounded engineer. …

I had some errors updating Linux (Debian) OS system packages, below, I will run through how I fixed the packages. When I ran sudo apt-get update I got the following message. E: The repository 'http://apt.postgresql.org/pub/repos/apt -pgdg Release' does not have a Release file. N: Updating from such a repository can't be…

With the target IP given with it’s username and password, we can easily SSH login into the target machine.

This article provides an in-depth guide to understanding and using the nslookup command in Linux. …

A Dockerfile is a text file that contains a set of instructions used to build a Docker image. Docker images are the basis of containers, which are lightweight and portable environments that encapsulate an application and its dependencies, allowing it to run consistently across different systems. A Dockerfile consists of…

How do you prevent credentials and API keys on your laptop to leak into the internet? — In this article, we are going to describe a possible solution to store secrets easily and securely on your laptop that doesn’t involve paying for third-party commercial software (eg. Hashicorp Vault) or cloud resources (eg. Secret Manager) or password managers (eg. 1Password). Introduction Storing secrets securely on your laptop has been…

Hello everyone, in this paper I will teach you about the ICMP protocol with a practical approach using the Windows Defender Firewall and testing connection between two devices. 1 | Requirements To follow along the practical section you need a device with Windows 10 or Windows 11 and another device with any Operating…