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How to SSH with ProxyJump in Linux
Secure Shell (SSH) is a widely used protocol for remotely connecting to a computer system, typically over a network. It provides encrypted communication and authentication to ensure secure access to a remote machine. In this article, we will discuss how to SSH with ProxyJump in Linux. ProxyJump is a feature in OpenSSH which allows you…
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How to Replace String in Files without Text Editor in Linux
As a Linux user, it’s important to know how to modify text files through the command line. One common scenario is changing a single line in a text file, such as enabling or disabling a feature. But what if the OS doesn’t have any text editor installed at all? In this tutorial, we’ll cover how…
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Why is it So Hard to Start Working on Our Own Dissertation
Today I felt so overwhelmed. Too many tasks have to be done here and there, constantly consuming my energy to work on my dissertation. I don’t quite understand what happens. So I asked ChatGPT exactly using this post title, and it responded with good pieces of advice. 🙂 Why? Starting to work on a dissertation…
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How to Install the Latest OpenWRT on Arduino Yun
By the time I am writing this, this might be the first article that tells you how to install OpenWRT on Arduino Yun because no one talks about it. Also, Arduino Yun is already reached its end of life, and the version history is not well documented in each article so I will write it…
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How to Find and Connect to Hidden Wifi Network
Suppose you have a device that communicates using wifi, and you already know the password, but you can’t find the SSID name on your phone or computer. How can you connect? In this post, I will show you how to find and connect to the hidden network using Kali Linux. Prerequisites Getting SSID Name Make…
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How to Install Alfa AWUS036NH Driver for Kali Linux
This wifi adapter is an important weapon for penetration testers due to its feature that supports monitor and packet injection mode on a 2.4Ghz network. However, even if Alfa said it is already supported out of the box in Kali Linux, I found it unstable out of the box. Sometimes it goes undetected. So here…
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How to Do Buffer Overflow Attack on 64bit Machine
Professor’s course material was out of date. He made an example of a buffer overflow attack several years ago. Then here I am, asked to fix the code to work on a modern machine, 64bit Kali Linux. There should be no difference with other Linux; you can practice this on any 64bit Linux machine. Prerequisite…
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This is The Most Expensive Thing That I Have Repaired
That day, Professor told me to start learning about power side-channel attacks. Our lab has some ChipWhisperer lite kits, and I took one. I took the course and learned how to do CPA and DPA with invasive methods, which we need to connect physically to the victim chip to measure the power trace. I did…
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Problem When Building Old OpenSSL Version on The New System
The old OpenSSL seems to have a problem when built using a newer system. I got this problem when compiling OpenSSL 1.1.0f on my Ubuntu 22.04. For example in my case here the problem is in line 17 on Configure file and the line were like this: Some people tried changing the lines with qw/glob/…
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How to Access SOM9331 Serial Console in Linux
I got this old hackable mini router board. It comes with OpenWRT but I can’t seem to connect this via USB Serial. It turns out that the driver is not installed. Installation is quick but there is a minor change needed in order to build the driver on a recent kernel. So will write here…
