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Enums in C: Enumeration Syntax, Values, and State Machines

Define enumeration constants in C: assign integer values to enum, implement finite state machines, and compare enum vs #define constants.

How to Get File Size in C Using POSIX stat System Call

Get exact file byte sizes in C on Linux: use stat() system call and inspect st_size from struct stat without opening file descriptors.

Reading Information from Sysfs Files in Linux: A Complete C Program Tutorial

Sysfs is a virtual filesystem in Linux that provides information and control over kernel objects and devices. … Read more

How to Enable DRM Driver Debug Logging in Linux

Enable Direct Rendering Manager (DRM) kernel debug logging: set drm.debug=0x1f boot parameter, inspect dmesg, and debug display stack output.

Adding Timezone Information to Root Filesystem Using Yocto

When working with embedded Linux systems using Yocto, configuring timezone information is crucial for accurate system time … Read more

Integrate a Custom Driver Module into the Linux Kernel Source Tree

While out-of-tree loadable kernel modules ( .ko ) are useful for out-of-band development, integrating a driver into the Linux kernel source tree allows it to be configured via make menuconfig and compiled statically ( vmlinux ) or as a modular driver target. Step 1: Create driver directory and C s

Understanding Debug Levels for Linux Kernel PrintK: A Comprehensive Guide

In Linux kernel development, debugging is an essential process for identifying and fixing issues. The printk function … Read more

Understanding Linux Kernel likely and unlikely Macros: Optimization Insights

In Linux kernel development, performance optimization is crucial for ensuring efficient execution of code. The likely and … Read more

Read Screen Information in C: Example Using struct fb_var_screeninfo and struct fb_fix_screeninfo

Accessing screen information such as screen size and resolution is crucial for various applications and drivers in … Read more

How to Test Linux Framebuffer Drivers in C (mmap /dev/fb0)

Test Linux kernel framebuffer drivers in C: open /dev/fb0, fetch screen dimensions via FBIOGET_VSCREENINFO ioctl, and paint pixels via mmap().

How to Benchmark USB Flash Drive Read/Write Speed on Linux

Measure USB flash drive write and read speed on Linux: benchmark block performance using dd count=1000 bs=1M status=progress and hdparm.

Simple Example of a Real-Time Clock (RTC) Linux Driver: A Beginner’s Guide

Real-Time Clock (RTC) Linux drivers are essential for managing system time and maintaining accurate timestamps across reboots … Read more

Test Code for Real-Time Clock (RTC) Linux Driver

Testing code for Real-Time Clock (RTC) Linux drivers is crucial for ensuring accurate timekeeping and system reliability. … Read more

Top Open Source Linux Performance & Debugging Tools

Master open-source Linux performance profiling and debugging tools: trace system calls with strace, profile CPU with perf, and find memory leaks.

Setting Up an Ubuntu Development Environment for Yocto Project

Setting up a robust development environment is crucial for working with the Yocto Project, especially on Ubuntu. … Read more

Array of Pointers in C: Memory Layout and Dereferencing

Understand array of pointers in C: compare char *arr[] vs 2D arrays, dereference double pointers **ptr, and pass pointer arrays to functions.

Create Yocto BitBake Recipes Using the devtool add Command

Creating and managing BitBake recipes is a core task in Yocto Project development. The devtool add command … Read more

What is a Yocto .bbappend File? Extending Recipes with .bbappend Files Explained

In the Yocto Project, customizations and extensions to recipes are crucial for tailoring builds to specific needs. … Read more

Yocto DEPENDS vs. RDEPENDS: Understanding Build-Time and Run-Time Dependencies

In Yocto Project, managing dependencies efficiently is crucial for creating optimized and reliable Linux distributions. Two key … Read more

Create a Bootable USB Pen Drive for Installing Ubuntu

Creating a bootable USB pen drive is a crucial step for installing Ubuntu on your computer. This … Read more

Configure Browser Caching Headers in Apache and Nginx

Browser caching instructs client web browsers to store static assets—such as CSS stylesheets, JavaScript files, images, and web fonts—locally on the user's machine. Subsequent page views load static assets directly from local disk cache, reducing HTTP requests and server load.