How to enter the shell programming interface in Linux?

To access the shell programming interface of Linux, you can follow these steps:

1. Open the terminal: In a Linux system, you can open the terminal by either finding it in the application menu or using the shortcut Ctrl+Alt+T.
2. Create a new shell script file: You can use any text editor (such as vi, nano, etc.) to create a new .sh file. For example, you can use the following command to create a script file named myfile.sh:

$ nano myfile.sh

1. Write a shell script: You can write your shell script in the open text editor. For example, you can write a simple Hello World script.

#!/bin/bash
echo "Hello World"

1. Save and exit the text editor: press Ctrl+X, then press the Y key to save changes.
2. Grant script execution permission: Enter the following command in the terminal to grant execution permission to the newly created script file:

$ chmod +x myfile.sh

1. Run the script: Input the following command in the terminal to execute your script:

$ ./myfile.sh

This will print “Hello World” in the terminal.

By following the above steps, you can access the shell programming interface of Linux and create and execute your own shell scripts.