Linux Signals: Custom Ctrl+C Handler (SIGINT, SIGUSR1, SIGALRM)
Short practical Linux signals guide with one full C example: change Ctrl+C behavior, send SIGUSR1, and use SIGALRM timeout.
Systems Programming
Linux IPC in Embedded Systems: Short Practical Guide
A short practical guide to Linux IPC for embedded Linux: pipes, message queues, shared memory, Unix sockets, and signals with pros/cons and code snippets.