Ubuntu Linux: Find Groups A User Belongs To

To find the groups a user belongs to on Ubuntu Linux, you can use the groups command. This command displays the groups that a user is a member of, as well as the user's primary group.

Here is the syntax for the groups command:

groups [USERNAME]

Replace USERNAME with the name of the user you want to check. If you omit the USERNAME argument, the groups command will display the groups for the current user.

For example, to find the groups for the user john, you can run the following command:

groups john

This will display the groups that the user john belongs to, separated by spaces.

Alternatively, you can use the id command to display more detailed information about a user, including the user's groups and other user identification numbers (UIDs). The syntax for the id command is as follows:

id [USERNAME]

Replace USERNAME with the name of the user you want to check. If you omit the USERNAME argument, the id command will display information about the current user.

For example, to find the groups and other user identification numbers for the user john, you can run the following command:

id john

This will display the user ID (UID), group ID (GID), and the list of supplementary group IDs (SGID) for the user john.

Keep in mind that you must have the necessary permissions to view the groups for a user. If you do not have the necessary permissions, the groups or id commands will display an error message.

For more information on the groups and id commands and how to manage user groups on Ubuntu Linux, you can refer to the groups and id documentation or the Ubuntu documentation.