Some of the fundamental knowledge that a security professional must have is using properly the Linux ‘find’ command. At the time I did this room I couldn’t find any blog posts about it to help me with the questions. So, I decided to do this post with all the answers to help anyone who gets stuck. I particularly learn a lot by checking answers and seeing where I’m making mistakes more than getting stuck in a problem and frustanting myself by trying to figure it out by trial and error....

A Network topology is the way a network is organized, including the physical or logical characterization of how nodes are set up to connect to each other. Bus Topology The first type of network topology is called a bus, in which all the nodes are connected together using a single cable. In a bus topology every node on the network can see every packet that’s sent on the cable. Each computer can respond to data sent to it and ignore data sent to other computers on the network....

I know you want ACTION, but calm yourself, you’ll thank me later. I will give you several reasons in this post as to why your first step in studying to be a cybersecurity professional should be learning Linux. I started years ago by trying to hack some stuff before having ANY knowledge in Operational Systems in general and of course I failed miserably. This first experience was so frustrating that I gave up becoming a hacker and only went back to study about it again a couple of years later....

OhSINT room is free and can be accessed through the following link: OhSINT. The room description is “Are you able to use open source intelligence to solve this challenge?” Basically, the whole concept of this room is using free tools to find information only based in the picture provided by the room’s author. Step 1 - Download the picture. Now we’ve got a familiar picture - a WindowsXP standard wallpaper....

Here is the first of three basic C programs that I intend to post here as examples. In my early days I struggled to find real programs to exercise and see how concepts are applied. In this first program, I applied inicial concepts such as: variables; functions; loops (ifs, while…). I think the only part of my program that can confuse beginners is how I generated a random number here:...