A sysadmin may want to add a new user that will have no root access (nor
I don't sell hosting services but I can bring this field as an example; an hosting company gives its customers the ability to SSH tunnel into their own shared-hosting partition on a system (in which they won't be operate as
root or with
sudo, but just as a regular user, likely with many predefined technical disabilities like the absence of some common utilities).
How to create such a user a user with no sudo and not any other way to use root?