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Building Your Own Linux Tools with Ruby: A Practical Guide

Jesus Castello — Mon, 27 Jun 2016 19:14:34 +0000

Tools like ps, top & netstat are great, they give you a lot of information about what’s going on your system. But how do they work? Where do they get all their information from? In this post we will recreate three popular Linux tools together. You are going to get a 2×1 meal, learn Ruby […]

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Watching your network

Jesus Castello — Sat, 29 Mar 2014 19:32:54 +0000

There is a number of tools you can use in Linux to see what is going on your machine at the network level, one of the most common is netstat. This command will show you all the connections on your system, including some that you may not be interested in, like UNIX sockets. There are […]

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Wireshark: Quick tips

Jesus Castello — Thu, 10 Oct 2013 14:37:05 +0000

Do you want to learn some new tricks to make your Wireshark experience better? You have come to the right place, let’s get going! Protocol statistics + Apply as filter To get a sense of the kind of traffic you have on a packet capture session you can use the protocol statistics window. To open […]

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Game hacking: messing with game saves.

Jesus Castello — Mon, 10 Jun 2013 11:17:14 +0000

Would you like to skip that annoying level or perhaps get some extra cash? Well, you are in the right place! We are going to have some fun by editing a savegame and get a small advantage. Welcome to game hacking. Out test subject is going to be Capsized. A platformer game I picked up from […]

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Column formatting

Jesus Castello — Fri, 23 Nov 2012 19:21:29 +0000

Here is a quick tip on how to make the output of some tools prettier, for example we can use the mount command which by default looks like this: [crayon-57fa1be1892aa542987187/] Using the column command with the -t option we can apply some formatting so it is more readable: [crayon-57fa1be1892b8685241321/] Much better, isn’t it? Man page […]

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