How to completey create a new repo or branch using command line?

Hi,

I am pretty new to github as in really pushing my stuff up to github.
Now, I know that I can go to my github account Name/ and I can do a manual insert of new repository for my new uploaded stuff.

I’d like to know if it is possible to recreate a new repository in my account via command line ?
Because I try to do it but no matter how I search I can’t find my github URL… it just shows all the projects that I have forked etc.

BTW, I am not sure if repository and branch are the same thing.

Hope someone could advise me.

Thanks alot.