You can change which users are allowed to make changes to the system by giving them administrative privileges.GNOME Documentation Projectgnome-doc-list@gnome.orgChange who has administrative privileges
Administrative privileges are a way of deciding who can make changes to important parts of the system. You can change which users have admin privileges and which ones don't. They are a good way of keeping your system secure and preventing potentially damaging unauthorized changes.
Click your name on the top bar, select System Settings and open User Accounts.
Click Unlock and enter your password to unlock the account settings. (To give a user admin privileges, you must have admin privileges yourself.)
Select the user whose privileges you want to change and then click the option next to Account type.
Choose Administrator if you want the user to be able to perform administrative tasks, like installing new applications.
Choose Standard if you don't want the user to be able to perform admin tasks.
Choose Supervised if you want the user to have an extra-secure user account which has extra restrictions on things like connecting to networks. Use this option if the user is someone you don't know (e.g. a "guest user"), or who may try to make unwanted changes to the system.
Close the User Accounts window. The user's privileges will be changed when they next log in.
The first user account on the system is usually the one that has admin privileges. This is the user account that was created when you first installed the system.
GNOME Documentation Project
Explain how admin privileges can be given to other people, or removed. Warn the reader about how it's unwise to have too many admins on a system.