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Understanding /etc/passwd – Linux User Account Properties (Day 10 of 30)

Table of Contents Introduction Why Understanding User Account Properties Matters The /etc/passwd File – A Goldmine of User Info Breaking Down Key Fields How to View and Interpret ...

30.04.2025 0 Read More

The OPSEC Starter Journal: A Real-World Guide for Beginners

“Security is not a product, but a process.” – Bruce SchneierWelcome to the world of OPSEC — short for Operational Security. It’s more than a military term. In our hyper-connected age, OPSEC ...

30.04.2025 0 Read More

Building a Simple TCP Client in C: A Ground-Up Networking Exercise

🔌 Part 1: Building a Simple TCP Client in C As engineers, we often work several layers above the network stack—abstracted by frameworks, SDKs, and libraries. Recently, I decided to go back to ba...

30.04.2025 0 Read More

Mastering Permission Management with `sudoers` in Red Hat Linux

Managing administrative privileges in Red Hat Linux is crucial for maintaining security and preventing unauthorized actions. The sudoers file plays a key role in permission management, defining who ca...

30.04.2025 0 Read More

Simple menus in Bash scripts with select

Welcome to the next pikoTutorial!The select command in shell scripting provides an easy way to present a list of options to the user and handle their selection. It is particularly useful when you have...

01.05.2025 0 Read More

From Manual Patching to Automation: Introducing Red Hat Satellite

Managing patches manually is fine until your infrastructure grows. Table of Contents What is Red Hat Satellite? Why Use Red Hat Satellite for Patch Management? How It Works (At a Glance) Conc...

01.05.2025 0 Read More

Scripting Series – Part 3 of 8

We will continue our scritpting series - with part 3 in the series.Here we will look at a script that breaks out of a for loop.Shell scripting in Linux is essential for automating repetitive tasks, st...

01.05.2025 0 Read More

Building An Auction System Using Java.

I recently was tasked with building an auction system, somewhat like an e-commerce application. Picking a stack for this was pretty much straight-forward,because of it's rich framework. So i decided t...

01.05.2025 0 Read More

Mastering User Management in Linux: useradd, usermod, passwd and userdel

Introduction As I continue my 30-Day Linux Challenge in preparation for the RHCSA exam. Today I’m covering something every system admin must know user management in Linux.Whether you’re o...

01.05.2025 0 Read More

Endpoint Security: A Low-Cost Data Diode

You’ve installed all security patches and updates on your system.You’ve run a complete system scan with updated antivirus software.You’ve tightened your firewall rules and started a VPN connecti...

01.05.2025 0 Read More

Understanding /etc/passwd – Linux User Account Properties (Day 10 of 30)

The OPSEC Starter Journal: A Real-World Guide for Beginners

Building a Simple TCP Client in C: A Ground-Up Networking Exercise

Mastering Permission Management with `sudoers` in Red Hat Linux

Simple menus in Bash scripts with select

From Manual Patching to Automation: Introducing Red Hat Satellite

Scripting Series – Part 3 of 8

Building An Auction System Using Java.

Mastering User Management in Linux: useradd, usermod, passwd and userdel

Endpoint Security: A Low-Cost Data Diode

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