How can you list all groups a Linux user is associated with?

To list all groups associated with a specific Linux user, the command groups username is used. This command provides a straightforward way to view all the groups that the user is a member of, displaying the user's primary group first, followed by any supplementary groups.

Using the correct command is essential as it directly queries the necessary information from the system’s group database, providing output that clearly lists each group. The command is concise and commonly utilized in Linux environments, making it a standard practice for system administrators and users alike to check user group memberships efficiently.

Other options, while they may seem related to the task, do not correspond to valid commands in standard Linux distributions for retrieving a user's group memberships. As a result, they would not yield the desired information or may result in an error if run in a terminal. Thus, groups username is the correct and effective solution for this requirement.