SIGUSR1 Default Action: Why Signals Terminate Processes
SIGUSR1 defaults to terminating processes with no core dump. Learn why POSIX chose this behavior, how to install handlers, and debug unexpected signal deaths.
Tag: Linux programming
6 Linux IPC Mechanisms: When to Use Each
Pick the right Linux IPC mechanism for your task: pipes for streaming, sockets for client-server, shared memory for throughput, signals for notifications.
How Linux File Descriptors Work: The Three-Layer Model
File descriptors are per-process integers that index into a three-layer table structure. Learn how the kernel connects descriptors to open files and inodes.
Linux Process Life Cycle: States, Signals, and Diagnosis
Linux processes cycle through R, S, D, and T states. Learn to read /proc, use strace, and diagnose stuck tasks without guessing or killing blindly.
Writing a Daemon in C: The Double-Fork Explained
Master daemon creation in C with the double-fork and setsid technique. Verify detachment with ps and strace to ensure your service survives logout.
Linux System Calls Tutorial: A Step-by-Step Guide
Have you ever wondered how a user program actually reaches the kernel to do privileged work? I set the goal for this tutorial: show how a program crosses the CPU boundary, what the kernel does next, and how you can verify behavior with tracing tools. I explain what you will be able to do by […]
How to Load Linux Kernel Modules With Modprobe
Use modprobe to load Linux kernel modules safely with dependency resolution. This guide covers the commands, diagnostics, and configuration you need.
PostgreSQL vs MySQL: Pick the Right Linux Database
PostgreSQL leads for debuggability and correctness, MySQL for ecosystem scale, SQLite for single-process apps. Choose based on workload, not rankings.
Linux Kernel Modules: Load, Unload, and Troubleshoot
Master kernel modules with lsmod, modprobe, and dmesg. Learn to load drivers, manage dependencies, and fix load failures without rebooting your system.