Dell PowerFlex Appliance with PowerFlex 3.x Administration Guide

While you can add and remove users from a group (such as wheel) with gpasswd, the command doesn't have a way to show which users are members of a group. In order to see which users are part of the wheel group (and thus have sudo privileges by default), you can use the lid function. lid is normally used to show which groups a user belongs to, but with the -g flag, you can reverse it and show which users belong in a group using the following sudo lid -g wheel. The output will show you the usernames and unique identifiers UIDs that are associated with the group. This is a good way of confirming that your previous commands were successful, and that the user has the privileges that they need.