When working with a Linux system, it may be necessary to switch between users in order to perform certain tasks. This can be done using the su command (which stands for "substitute user").

The su command allows you to temporarily become another user, typically one with higher privileges than your current user. For example, you may need to become the root user in order to install software or modify system settings.

To use the su command, simply type su followed by the username of the user you want to become:

su username 

You will then be prompted to enter the password for the user you are switching to. After entering the correct password, you will be logged in as that user and can perform any actions that user is authorized to perform.

It's important to note that using the su command gives you full access to the system and can potentially cause damage if used improperly. It's recommended that you only use the su command when necessary and always log out of the other user account when you're done.

To exit the other user account, you can simply type exit or logout. This will log you out of the other user account and return you to your original account.

Another way to switch between users is to use the sudo command, which allows you to execute specific commands with elevated privileges without having to switch to another user account. This can be a safer way to perform administrative tasks, as it limits the actions that can be performed with elevated privileges.

Overall, it's important to understand how to switch between users in order to effectively manage a Linux system and perform necessary tasks with the appropriate level of privileges.