What does shell mean?

What does shell system mean? I believe many people have heard of shell, but they may not know what shell means. Below, php Chinese website will take you to know what shell means.

1: What does shell mean?

Shell is a command language that provides an operating interface for users. Software, the software can receive the user's commands, execute the commands entered by the user, and then call the corresponding program.

2: Shell can be divided into two major categories

1.shell command line

For example, some systems linux, in the traditional sense , if not specified, the shell is generally a command line. The shell is the interface between traditional operations and the outside world. The shell is the outermost layer of the operating system and manages the interaction between the user and the operating system. The operating system completes the user's operations and processes the output results. The shell realizes the interaction between the user and the system. The user inputs on the keyboard and gets a response. The shell is basically a command parser.

2. Graphical interface shell

Currently the most widely used windows operating system, there are many Linux shells, including FluxBox and CDE.

3: Some common shell commands

1.rm refers to deleting files

2.echo refers to displaying the specified text

3.cat file name output file content to basic output

4.cb format source code

5.date current time and date

The above is what the shell is Full introduction to the meaning, if you want to know more about HTML video tutorial, please pay attention to php Chinese website.

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