Shulou(Shulou.com)06/01 Report--

In this issue, the editor will bring you about the types of R1-004 Shell commands. The article is rich in content and analyzed and described from a professional point of view. I hope you can get something after reading this article.

There are three kinds of commands that Linux Shell can execute: built-in commands, Shell functions, and external commands.

(1) the built-in command is the command contained in the Shell program itself. These commands are integrated into the Shell interpreter, such as cd. When a built-in command is executed, there is no process creation and demise.

(2) the Shell function is a series of program code written in Shell language, which can be referenced like other commands.

(3) external commands are executable programs independent of Shell. Such as find, grep. When the command line Shell executes an external command, it creates a copy process of the current Shell to execute. During execution, there is the creation and demise of processes.

These are the types of R1-004 Shell commands shared by the editor. If you happen to have similar doubts, you might as well refer to the above analysis to understand. If you want to know more about it, you are welcome to follow the industry information channel.

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