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Managing files, running scripts, and executing terminal commands on your smartphone from a computer is much more convenient through a full SSH session, eliminating the need to switch between device screens. ​Installing OpenSSH Open Termux and install the package for the secure protocol: pkg update && pkg install openssh Configuration ​Set a password to secure the connection: passwd ​ Find your current username using the whoami command (usually looks like u0_a... ). ​Start the SSH server: sshd ​Connecting from a PC Find your smartphone's local IP address using ifconfig (look for the inet line under the wlan0 interface). Note that Termux uses a non-standard port 8022 by default instead of the standard 22. Connect from your computer (Linux, macOS, or Windows via PowerShell/PuTTY): ssh <username>@<smartphone_IP> -p 8022 After entering your password, you will gain full access to your phone's terminal directly from your PC. Autostarting the Server To avoid starting the server manually every time you open the app, add the command to your shell configuration: echo "sshd" >> ~/.bashrc This tool turns your mobile device into a fully functional remote node that is easy to manage over the local network when developing and testing lightweight projects. I share more simple and awesome smartphone IT projects on my Telegram channel: @termuxq

I Turned an Android Phone Into a No-Root Cybersecurity Learning Workspace Most people don't look at an Android phone and think: "This could be a practical Linux, Python, networking, and cybersecurity learning environment." Usually, the assumption is that serious technical learning requires a laptop, a virtual machine, or dedicated hardware. I wanted to see how far I could push the opposite idea. What if the Android phone you already own could become a practical learning workspace without root access? That experiment eventually became DedSec . DedSec is a free and open-source project built around Android and Termux. Its goal is not simply to install a large collection of tools. The goal is to create an environment where someone can actually learn how the pieces fit together. Repository: https://github.com/dedsec1121fk/DedSec Official website: https://ded-sec.space/ Why Android? Android devices are incredibly capable machines. Even an older phone can provide: a Linux-like command-line environment through Termux Python Git package management networking utilities file manipulation scripting automation local development workflows And you can do a surprising amount without root access. The limitation isn't always the hardware. A bigger limitation is often knowing what to do with it. You can install dozens of packages, copy commands from tutorials, and still not understand what is actually happening underneath. That was one of the problems I wanted DedSec to address. More Than a Collection of Scripts There are plenty of repositories containing security scripts. That wasn't enough for what I wanted to build. Installing a tool doesn't automatically teach you: what problem the tool solves when you should use it what its output means what layer of the system is failing how networking concepts connect together why a command works why another command fails So DedSec gradually became an ecosystem rather than just a scripts directory. The project connects several things together:

You don't need a cloud server to start learning Linux administration. A few days ago, I came across a LinkedIn post by Luiz Fernando dos Santos about turning an old Android phone into a Linux server using Termux. Reading his post made me wonder: Do I really need to pay for a VPS just to learn Linux and server administration? The answer, at least for now, seems to be no. Inspired by his idea, I decided to build my own learning environment using nothing but an Android phone and Termux. This article is the beginning of a series where I'll document everything I learn along the way. Inspiration Before getting started, I'd like to give credit to Luiz Fernando dos Santos, whose LinkedIn post inspired this project. His idea of using an old Android phone as a Linux server showed me that I didn't need to rent a VPS to start learning Linux administration. You can check out his original post here: 🔗 https://www.linkedin.com/pulse/transformando-um-android-antigo-em-servidor-luiz-fernando-dos-santos-gu1if/ First Steps I had already been using Termux for quite some time, so the first thing I did was update all the installed packages. apt update apt upgrade -y After that, I installed OpenSSH. pkg install openssh Before moving on, I wanted to understand what SSH actually is instead of just following commands from a tutorial. SSH (Secure Shell) is a protocol that allows you to securely connect to another computer or server through an encrypted connection. It's one of the most common ways to remotely access Linux servers. After installing it, I found the Termux username, configured a password and started the SSH server. Then I tried connecting from my computer... And it worked! It may sound like a simple thing, but seeing my computer remotely access the Linux environment running on my phone was surprisingly satisfying. Improving the Authentication After getting the basic connection working, I started researching how authentication by SSH keys works. I learned that instead of typing a