What is the command to switch users in Linux?

Switch user command: su, supported options: -l (login shell), - (retain environment variables). Switch to the root user: su root; switch to another user: su username; switch back to the current user: exit. Use caution when switching to root and use sudo to grant superuser privileges to specific commands.

Linux command to switch users

In the Linux system, switching users can ensure the permissions between different users Isolation and data security. Switching users can be achieved through the following command:

su

Syntax:

• su [-l] [ -] [Username]

Options:

• -l: Log in as the specified user's login shell.
• -:Retain the user's current environment variables.

Usage:

• Switch to root user:

<code>su root</code>

• Switch to another specified user:

<code>su somename</code>

• Switch back to the current user:

<code>exit</code>

When usingsu When using the command to switch users, the system will prompt you to enter the password of the target user. After entering the password, you will switch to that user environment.

Notes on switching to the root user:

• Use the su command with caution, because the root user has all permissions on the system.
• Avoid using the root user for daily operations unless necessary.
• If you need to use root privileges for a long time, you can use the sudo command, which can grant superuser privileges to the specified command without switching users.

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