I've realized that for some commands like wget and dig, we need to use the command yum to install them before we can use them.
Doing some research the dig command doesn't come installed for security purposes and for it's installation we can run the following command: yum install bind-utils which is a package that comes with dig.
I used to use cmd back in windows and the command line a used allot was
cls its kind of like the clear command in Linux but it cleans the screen permanently
if you use the clear command it just scroll down.