[CentOS] upload a file to new github repository

Though I've used version control systems before and even set up a couple 
over the years, and though it was simple to setup a github repository 
(which I did just a couple minutes ago), I can't figure out how to 
upload the first file to it.  I'm logged in, on the repository's home 
page, but can't see an option for that.  I also read instructions for 
set up on the web and the git manpage, but no help there.  Anybody here 
know to put a code file into the repository?

Thanks.