达内培训Linux代码，杨强老师讲解，包括io、文件编程、进程、线程、信号、进程间通信、以及底层的网络编程、crc校验、抓包等-Linux code up to training, Yang Qiang teacher explain, io, file programming, processes, threads, signals, inter-process communication, as well as the underlying network programming, crc