Creating SSH Pub Key

Goto user home, run 

ssh-keygen -t rsa

Generating public/private rsa key pair.

Enter file in which to save the key (/Users/yichunzhao/.ssh/id_rsa): 

Created directory '/Users/yichunzhao/.ssh'.

Enter passphrase (empty for no passphrase): 

Enter same passphrase again: 

Your identification has been saved in /Users/yichunzhao/.ssh/id_rsa

Your public key has been saved in /Users/yichunzhao/.ssh/id_rsa.pub

The key fingerprint is:

cd user home directory

cd .ssh

cat id_rsa.pub (public key)

put this key in the github. 

How to create SSH key