So I have installed Centos, I was logged in as a normal user which i created during installation, but my normal user is not added to the sudo, so I need to login as root su -, then I run usermod -aG wheel your_username where your_username has to be replaced with your actual username, there is no sudo group though so if you were an Ubuntu user and got used to how Ubuntu did things you need to adjust a bit for CentOS.
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