（操作系统课程设计）掌握Linux操作系统的使用方法，包括键盘命令、系统调用；掌握在Linux下的编程环境。



编一个C程序，其内容为实现文件拷贝的功能；



编一个C程序，其内容为分窗口同时显示三个并发进程的运行结果。要求用到Linux下的图形库。 -(Operating systems curriculum design) to master the use of the Linux operating system, including keyboard commands, system calls　grasp the Linux programming environment. Compile a C program, the contents of the file copy function to achieve　compile a C program, its content for the sub window also shows the results of running three concurrent processes. Requirements to use graphics library under Linux.