Use ssh in Git.

STEP1

First of all, check if you have had public key by:

cd ~/.ssh

ls

If you have foo and foo.pub, it means that you aleardy have a private key and a public key. Repeat the following methods will overwritten the keys if they have the same name.

To generate ssh key, use the command below:

ssh-keygen -t rsa -C "your_email@youremail.com"

Feel free to enter ENTER during the generation.

STEP2

To check your public key (Note, id_rsa is the default name):

cat ~/.ssh/id_rsa.pub

Copy it and paste into GitHub's settings page in Account Settings->SSH Keys->Add SSH key.

Note: if you use this key to access to your remote server, then you can copy the content of your public key and paste it into the ~/.ssh/authorized_keys file.

STEP3

To test it:

ssh -T git@github.com