This book is about writing software that makes the most effective use of your system is running on - code that interfaces directly with the kernel and core system libraries, including the shell, text editor, compiler, debugger, core utilities, and system daemons. High-level debugging code often requires you to understand the system calls and kernel behavior of your operating system, too. The main topics include: An overview of Linux, kernel, library C, and C compiler Reading from and writing to files, along with other basic file I / O operations, including how the Linux kernel implements and manages file I / O Buffer size management, including the Standard I / / O library Advanced I O interface, memory mapping, and optimization techniques The family of system calls for basic process management Advanced process management, including real-time processes File and directories-creating, moving, copying, deleting, and managing them Memory management - interfaces for allocating memory, memory management that you have, and optimizing your access memory signals and their role on a Unix system, plus basic and advanced signal interfaces Time, sleeping, and clock management, starting with the basics and continuing through POSIX clock and timer with high resolution With Linux System Programming, you will be able to take a deep look at Linux from both theoretical and applied perspective as you cover a variety of programming topics.