How to give Sudo permission to an existing user?

[Iqbal]

Hello,
I want to create Sudo excess to an existing user. I found some links where it shows that adding new sudo user but not an existing user.

Would you please help me on that?

Thanks in advance

[TrevorH]

Add the user to group wheel then have them log back in again. That gives them full access to do anything so only if you really trust them!

[Iqbal]

Thank you so much!