How to create a new user with all privileges of the current user in Linux terminal?

Question

It is known that useradd is used to add new user accounts.

useradd newuser

The -G flag is used to add groups for respective privileges. Is there a simpler way to create a user will all privileges of a specific existing user?

Answer 1

There may be a cleaner way to do this, but if I understand correctly, this should work:

useradd -G $(groups | tr ' ' ',') newuser

groups gives you a list of the groups the current user (or a different user if specified) belongs to, seperated by spaces. tr converts the spaces to commas, since that is what useradd expects.