Shell first Knowledge

[This is Android embedded learning series I]

Although I have been using Linux for more than a year, I do not know many principles. Now, let's take notes on learning Android embedded courses with sundy.

Shell is actually an interface for user interaction with the computer. Unlike the drag-and-click operation on a visual interface, you need to use shell commands. When you input commands such as RM and ls in the terminal, the system will find the corresponding command tool in the environment variable path, or RM, ls is an executable file in the system. These files can also be compiled by downloading the source code. The source files are mostly written by C.

Shell commands interact with the underlying layer through bash other interpreters. Bash is the shell, or command language interpreter, that will appear in the GNU Operating System