If you are doing X11, for example, you can go low-level or pick any of a number of high-level libraries. The tutorial assumes you understand C and basic Linux programming. It has two sections, really.

This course provides an overview of System Programming for the Linux operating system, or software which is interfacing directly with the Linux Kernel and C library. The basic components of a Linux ...

2nd course in the Advanced Embedded Linux Development .Instructor: Dan WalkesThis course provides an introduction to Kernel programming for the Linux operating system, and the development of Linux ...