I am trying to setup a new repository on my existing GitHub account.
I followed the steps circled here:

When I run the command git push -u origin master, I get the following error:
error: unknown switch `u’
Any ideas as to the issue? Doing a Google search for this error didn’t seem to cough-up anything useful.
It seems your git client is too old. Try to update it to most recent version:
http://git-scm.com/