Linux operation tips: How to quickly find the current user

Title: Linux operation skills: Quickly obtain the current user name

In the Linux system, obtaining the current user name is a frequently used operation. By getting the current user name, we can perform some operations with specific permissions, or execute different commands according to different users. This article will introduce several methods to quickly obtain the current username and provide specific code examples.

1. Get the current user name through the command line:

In Linux systems, we can use thewhoamicommand to get the current user name.whoamiwill display the user name currently using the terminal.

whoami

After executing the above command, the system will return the user name of the current user, for example:ubuntu.

2. Get the current user name through environment variables:

In Linux systems, the current user name is usually stored in the environment variable$USER. We can get the current username by printing this environment variable.

echo $USER

After executing the above command, the system will return the user name of the current user, for example:ubuntu.

3. Get the current user name through theidcommand: The

idcommand can display the user’s real user ID, effective user ID, and group. and other information. We can use theid -u -ncommand to get the current username.

id -u -n

After executing the above command, the system will return the user name of the current user, for example:ubuntu.

Through the above method, we can quickly obtain the current user name, which is convenient for use in shell scripts or command lines. Hope the above content is helpful to you!

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