How To Add Users To Sudoers Group On Centos

First Login as root.

Create User

Let us create a dummy user first for this example.

adduser dummyuser

Create Password For User

Create password for our dummyuser.

passwd dummyuser

Add User To Wheels Group

usermod -aG wheel dummyuser

Adding User to the Sudoers File

To add user to sudoers file, we need to edit /etc/sudoers. Open the file using vi or vim.

vi /etc/sudoers

Add following line at the end in above file...

dummyuser    ALL=(ALL)    ALL

That's it. Now open a new shell and login as dummyuser. For any system level (root) tasks, just add sudo to the beginning of command line.