Its old info but there is always someone who doesnt know how to do it. For library reasons, here it is:
Launch a terminal. If you are using Windows, launch Git Bash.
Type the following command in your terminal, replacing with the email address that is linked to your Github account. When you have typed the command, press Enter.
ssh-keygen -t rsa -b 4096 -C “my-email@mydonain.com”
A new SSH key is generated.
You will be prompted to enter a directory to save the key. You can simply press Enter to accept the default location, which is an .ssh folder in the home directory. This means you will be able to locate the key in ~/.ssh/id_rsa.
You will be prompted to choose a passphrase. You also have the option not to create a passphrase. To skip the passphrase, press Enter twice to confirm that the passphrase is empty.
Optional: To navigate to the .ssh directory, and check the contents of the directory, run the following commands in the terminal:
cd ~/.ssh
and then,
ls
When you list the contents of the .ssh directory, you should see id_rsa and id_rsa.pub in the list of contents, where id_rsa is the private version of your key and id_rsa.pub is the public version of your key.
You now need to add the SSH key to the ssh-agent, which helps with the authentication process. To start the ssh-agent, run the following command in the terminal:
eval “$(ssh-agent -s)”
To add the key to the agent, run the following command in the terminal:
ssh-add ~/.ssh/id_rsa
I.T. tips and tricks 