Shulou(Shulou.com)06/02 Report--

Editor to share with you what su instructions can be used in the linux system. I hope you will learn a lot after reading this article. Let's discuss it together.

What is the function of su instruction in linux system?

1. Command function

The function of the su instruction in the linux system is to change to the identity of another user, except for the superuser, who needs to type the user's password.

two。 Mode of use

Su [- fmp] [- c command] [- s shell] [--help] [--version] [-] [USER [ARG]]

3. Parameter description

-f,-fast: no need to read startup files (such as csh.cshrc, etc.), only for csh or tcsh Shell.

-l,-login: after adding this parameter, it is like logging back in. Most of the environment variables (such as HOME, SHELL, USER, etc.) are based on the USER, and

And the working directory will change. If USER is not specified, the default is root.

-m,-p,-preserve-environment: the environment variable is not changed when su is executed.

-c command: the user whose account number is changed to USER, and then change back to the original user after executing the command.

-help display instruction file

-version displays version information

USER: the user account to be changed

ARG: pass in a new Shell parameter.

After reading this article, I believe you have a certain understanding of what su instructions can be used in the linux system. If you want to know more about it, you are welcome to follow the industry information channel. Thank you for reading!

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