The id command in Linux is extremely helpful for finding both the user ID (UID) and group IDs (GID) of a user. Knowing these IDs will be useful for tasks that involve user management. For example, checking if a specific user belongs to a group.
For managing users on Linux, several other commands might interest you. For example, usermod, useradd, userdel, and passwd help with the creation and modification of users on a Linux operating system.
This tutorial will show the basic syntax of the id command and the many options you can use to alter the behavior. We will take you through several examples of how you will likely use the command.