Some Questions about learning the embedded linuxd of the arm9-board mini2440?

Some Questions about learning the embedded linuxd of the arm9-board mini2440? -- Linux general technology-Linux technology and application information. For details, refer to the following section. After learning 51 single-chip microcomputer, I learned ARM9. after more than a week, I have been familiar with the LINUX environment, but I am not quite clear about the entire development process.
In particular, the detailed process of writing an application, I think the idea is a piece of code and cannot be connected. I don't know how to proceed ......
I now know about the hardware. I can use vi editing in shell and gcc compiling. But how do I feel that I don't know how to run what I wrote in shell?
If you know more about this, please give me some advice. I will remember the kindness of the younger brother who just stepped into the door of embedded LINUX.