busybox是一个工具集，它包括很多常用的工具软件，这些软件全部都编译成一个可执行文件，通过符号连接的方式创建各个工具的名称。这样不但占用空间小而且可以很方便的订制所需要的命令。-busybox is a toolkit, which includes many commonly used software tools, all software is compiled to an executable file through a symbolic link the various too