Essential Open-Source Linux Tools for Systems Debugging & Performance Profiling
Master essential open-source Linux performance and debugging tools: strace, ltrace, perf, Valgrind, iostat, ss, and iperf3 with command workflows.
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Android audio_policy_configuration.xml Architecture & Setup
Learn how Android Audio HAL routes streams, maps mixPorts to devicePorts, and configures audio_policy_configuration.xml for custom BSP hardware.
What Do the Colors in ls Output Mean? A Practical Guide
Blue is a directory, green is executable, red means broken or compressed. Here is the full color code for GNU ls, plus a two-minute way to prove each one to yourself.
How to Set Up TFTP Server on Ubuntu (tftpd-hpa Guide)
Set up a TFTP server on Ubuntu using tftpd-hpa: learn configuration, permission fixes, ufw firewall setup, and U-Boot embedded kernel image transfers.
Use TShark to Analyze PCAP Files: Options Explained with Examples
TShark is the terminal-based sibling of Wireshark, used to capture and analyze packets directly in the command … Read more
How to Capture USB Packets in Wireshark on Linux (usbmon)
Sniff USB traffic on Linux using Wireshark and the usbmon kernel module: step-by-step setup, non-root udev permissions, and USB URB display filters.
TFTP Client Setup on Ubuntu: Install, Configure, and Transfer Files
TFTP is a lightweight UDP-based file transfer protocol used for booting devices, flashing firmware, and transferring files to routers, embedded devices, and switches. It's ideal when devices have limited resources or you need to push firmware or config during boot, at the cost of no authentication o
Building Kernel Modules In-Tree During Kernel Compilation
Kernel modules are usually built out-of-tree, but for modules tightly coupled with kernel internals it's better to build them in-tree, as part of the kernel compilation itself, for header and config compatibility and automatic compilation during make . The example below uses linux-5.10/ as the so
Clean Email Lists in Python: Remove Invalid, Unsubscribed, and Bounced Emails
Cleaning an email list removes invalid addresses, unsubscribed users, and hard-bounced addresses before a campaign. Sending to any of these hurts sender reputation and can violate GDPR/CAN-SPAM.
Function Pointers in C: Syntax, Callbacks, and Real Examples
Master C function pointers: learn syntax, typedef declarations, qsort() callbacks, POSIX signal handlers, kernel vtables, and memory mechanics.
C Array of Pointers to Strings: Complete Syntax & Examples
Master array of pointers to strings in C: compare 2D arrays vs char* arrays, dynamic malloc allocations, memory layouts, and qsort string sorting.
Mastering Array Passing in C: Pass Arrays & Elements to Functions
Learn how to pass arrays and individual elements to functions in C: master array decay, const protection, 2D matrix stride, and VLA parameters.
Why Use Arrays in C: Memory, Cache & Performance Benefits
Discover why arrays are essential in C: contiguous memory allocation, O(1) index math, CPU cache line prefetching, and hardware DMA buffers.
Install Flutter and Dart Plugins in Android Studio (Beginner-Friendly Guide)
Android Studio is a powerful IDE (Integrated Development Environment) built on IntelliJ, optimized for Android and Flutter … Read more
Create a Custom Flutter Plugin with Android Support (Full Integration Guide)
Flutter allows you to write cross-platform mobile apps using Dart, but sometimes you need to access native … Read more
Understanding Android Properties: Get, Set, and Use System Properties with Examples
Android system properties are key-value pairs maintained by Android’s property service, used by the operating system and … Read more
How to Set Tab to 4 Spaces in Vim (.vimrc Config Guide)
Configure Vim and Neovim for 4-space indentation: master tabstop, shiftwidth, softtabstop, expandtab, and filetype-specific .vimrc settings.
Bitwise Operators in C: Embedded Bit Manipulation Guide
Master C bitwise operators (&, |, ^, ~, <<, >>): learn bit masking, clearing flags, RGB byte extraction, and embedded GPIO register manipulation.
How to Run Linux Background Scripts with GNU Screen
Keep shell scripts running after SSH disconnects using GNU Screen: master screen -S, detach (Ctrl+A d), reattach (-r), logging (-L), and nohup vs screen.
Array of Structures in C: Memory Layout & Production Examples
Master array of structures in C: learn contiguous memory layout, struct padding, pointer arithmetic, dynamic heap allocation, and qsort sorting.
Structure Initialization in C: Designated Initializers & Best Practices
Master C struct initialization: zero-initialization ({0}), designated initializers (.field = val), compound literals, and C99 memory alignment.
Bitfields in C: Memory Packing & Hardware Register Control
Master C bitfields for memory-constrained embedded systems: learn bit packing syntax, struct alignment, volatile registers, and portability gotchas.
Load Kernel, Bootloader & Filesystem Images via TFTP on Embedded Targets
TFTP is commonly used to load bootloader, kernel, and rootfs images to embedded targets (ARM boards, routers, IoT devices) during development or recovery. It's simple (no auth/encryption), fast on local networks, and supported by most bootloaders like U-Boot.
What is ARP? Understanding Address Resolution Protocol Basics (Simple Guide)
When two devices on a local network need to communicate, they don’t rely solely on IP addresses—they … Read more