how to use git with github

1. set-up user name and email
git config --global user.name "Firstname Lastname"
git config --global user.email "your@email.com"

git config --global color.ui auto

2. create ssh

$ ssh-keygen -t rsa -C "your@email.com"
Generating public/private rsa key pair.
Enter file in which to save the key (/Users/user_user_dir/.ssh/id_rsa): enter
Enter passphrase (empty for no passphrase):
Enter same passphrase again:
Your identification has been saved in id_rsa.
Your public key has been saved in id_rsa.pub.
The key fingerprint is:
created_fingerprint your@email.com
The key's randomart image is:
+--[ RSA 2048]----+
|          .+==o=+|

3. register public key to github
$ cat ~/.ssh/id_rsa.pub
ssh-rsa print_your_public_key your@email.com

4. connect to github
$ ssh -T git@github.com
Hi yourname! You've successfully authenticated, but GitHub does not provide shell access.

5. see this reference site :
https://help.github.com/articles/generating-an-ssh-key/

6. create git ignore file
https://www.gitignore.io/