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RPRavidu Priyankararavindu-priyankara.hashnode.dev6d ago · 44 min read

Reverse-Engineering Linux Kernel Crypto: From HMAC Key Preparation to AES Key Memory

1. Introduction 1.1 Why Crypto Internals? Last two month, I spent a significant amount of time investigating copy-fail vulnerability. During that process, I started looking deeper into Linux kernel me

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PAPaul Adeoyepaulking.hashnode.devOct 1 · 9 min read

Processes, System Calls and the Linux Kernel:

In the previous article, we established the relationship between the CPU, RAM, storage, and the operating system. With that foundation in place, the next question is: What actually happens inside the

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HRHritik ranjanblogs.hritikranjan.inSep 20 · 45 min read

🐧 Linux for DevOps: Complete Beginner to Advanced Guide with Commands, Networking, Users, Permissions, AWK, SED, LVM & More

If you are starting your DevOps journey, you will quickly realize that many tools and platforms run on Linux. For example: AWS EC2 Docker Kubernetes Jenkins Nginx Apache Terraform Ansible Prometheus G

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SIShevchenko Ivanhelp.dc24.cloudSep 9 · 7 min read

Edimax OAP1300 Recovery over UART + TFTP

A colleague handed me a dead Edimax OAP1300 access point. It powered on, the serial console showed U-Boot, and then… nothing. It sat in the TFTP recovery loop forever. This is how I brought it back by

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CRChris Royfreecodecamp.orgSep 7 · 21 min read

How a System Call Actually Works in Linux

Here's a small C program. It calls clock_gettime() three times, then writes five bytes to standard output. #include <stdio.h> #include <time.h> #include <unistd.h> int main(void) { struct timespe

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ASAsep Sayyadasepsayyad007.hashnode.devSep 5 · 20 min read

Your Linux Server Has 65,000 Ports. How Many Are Actually Exposed?

The hidden gap between listening sockets, binding interfaces, Docker NAT bypasses, and true perimeter exposure. You set up a new Linux server, configure UFW with a default deny policy, and feel confi

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UKUk Ktech-learning-sachin.hashnode.devSep 2 · 2 min read

What I Wish I'd Known Before Starting My First IT Support Role

My first IT support job started with three weeks of genuine imposter syndrome that I managed to hide reasonably well and then spent the following months slowly resolving through a combination of on-th

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ASAnne Sharwhythough.hashnode.devAug 29 · 5 min read

My Laptop Crashed and Taught Me How Linux Talks to Itself

In my experiment, I was browsing on my decade-old laptop to write this post, but all of a sudden EndeavourOS (Vanilla Arch) displayed a systemd message saying something like stdin, stdout and stderr a

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ABAkhilesh Bhayyedevops-journal.hashnode.devAug 28 · 2 min read

Linux Architecture, Explained the Way I Wish Someone Had Explained It to Me

Before touching a single command, I spent time understanding how Linux is actually structured, because every tool I'd learn after this (Jenkins, Docker, Ansible) runs on top of it, and debugging any o

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RDRojarani Daasarirojadaasari.hashnode.devAug 16 · 9 min read

Linux Philosophy and Concepts: Understanding Linux from History to Distributions

Linux is everywhere today — from cloud servers and smartphones to supercomputers, embedded devices, and critical infrastructure. But before working with Linux commands and administration, it is useful

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Reverse-Engineering Linux Kernel Crypto: From HMAC Key Preparation to AES Key Memory

Processes, System Calls and the Linux Kernel:

🐧 Linux for DevOps: Complete Beginner to Advanced Guide with Commands, Networking, Users, Permissions, AWK, SED, LVM & More

Edimax OAP1300 Recovery over UART + TFTP

How a System Call Actually Works in Linux

Your Linux Server Has 65,000 Ports. How Many Are Actually Exposed?

What I Wish I'd Known Before Starting My First IT Support Role

My Laptop Crashed and Taught Me How Linux Talks to Itself

Linux Architecture, Explained the Way I Wish Someone Had Explained It to Me

Linux Philosophy and Concepts: Understanding Linux from History to Distributions