TTY Demystified: A Deep Dive into the Linux Console

This article provides a comprehensive explanation of the Linux TTY subsystem. Tracing its history from 19th-century stock tickers to modern virtual terminals, it details the roles of UART drivers, line disciplines, TTY drivers, and signal handling. The article also covers process states, job and session management, flow control, and blocking I/O, using clear diagrams and examples. It unravels the complexities of the Linux console, offering deep insights for developers and advanced users.