Linux若何使用su进程进行切换？ (linux 调用 su 进程)

Introduction

Linux is an operating system that is used by millions of users due to its user-friendly interface, high compatibility with other platforms, and open-source community-driven development. One of the benefits of using Linux is the ability to perform tasks and administrative activities using the command line interface (CLI). One of the most commonly used commands in the Linux CLI is the “su” command which is used to switch between different users’ accounts. In this article, we will discuss the process of using the su command to switch between different users in Linux.

Understanding What the “su” Command Does

The “su” command in Linux is used to switch between different users’ accounts. This can be helpful in situations where a user needs to perform administrative activities or run a program that requires root or superuser privileges. The “su” command is also useful for switching between different user accounts without logging out of the current user account. The command can be used to switch between different users, such as root, admin, and regular user accounts.

Syntax for Using the “su” Command

The basic syntax for using the su command is as follows:

su [username]

This command will prompt the user to enter the password of the account they want to switch to. Once the correct password is entered, the user will be in a new shell as the user they switched to. The new shell will have the default environment variables of that user.

How to Use the “su” Command

To use the “su” command, the user needs to follow the steps below:

Step 1: Open a terminal window on the Linux system.

Step 2: Type in the following command:

su [username]

Replace [username] with the name of the user account you want to switch to. For example, if you want to switch to the root user account, the command would be:

su root

Step 3: Press enter to execute the command.

Step 4: You will be prompted to enter the password of the user account you want to switch to. Enter the password and press enter.

Step 5: If the password is correct, you will be logged into the new shell as the user you switched to.

Step 6: To exit from the new shell and return to the previous shell, type the “exit” command.

Conclusion

The “su” command is an essential command for Linux users who need to switch between different user accounts in a shell environment. The command is simple to use and requires the user to enter the password of the user account they want to switch to. The “su” command is an excellent way to perform administrative tasks and run programs that require root or superuser privileges. By following the steps outlined above, Linux users can easily switch between user accounts using the “su” command.