Given you've set up a git daemon on <url> and an empty repository:

   I.cd <localdir>

   II.git init

   III.git add .

   IV.git commit -m 'message'

   V.git remote add origin <url>

   VI.git pull <url> master    

   VII.git push -u origin master

from : https://stackoverflow.com/questions/3311774/how-to-convert-existing-non-empty-directory-into-a-git-working-directory-and-pus

After the step VI, you may meet of problem of "merge branch....", the solution is :

I. ctrl+O : to save info.

II. ctrl+x : to exit

5. Common problem

Q1:  ! [rejected]        master -> master (non-fast-forward) error: failed to push some refs to 'https://github.com/gll89/AD_MCI_NC_classifier.git'

A1 :In this case the only change was the readme file created as optional step when creating github repository.

from: https://stackoverflow.com/questions/11696295/rejected-master-master-non-fast-forward