Adding a public SSH Key to Github

At first, I did not add my public SSH key to Github. I can still push my projects to Github without SSH key, but it seems that there are more and more people adding their SSH key to Github.

How to add a public SSH Key to Github:

1. Register a Github account if you don't have one.

2. Replace my name and email address in the following steps with the ones you used for your Github account:

git config --global color.ui true
git config --global user.name "YOUR NAME"
git config --global user.email "YOUR@EMAIL.com"
ssh-keygen -t rsa -b 4096 -C "YOUR@EMAIL.com"

3. Print your public SSH key using cat command:

cat ~/.ssh/id_rsa.pub

And then, the shell terminal will display a long text staring with ssh-rsa and ending with "YOUR@EMAIL.com"

ssh-rsa
blah blah blah
YOUR@EMAIL.com

4. In Firefox:

• Go to URL: https://github.com/settings/keys
• Click the New SSH Key button
  
• In the Title text box, give it a name (e.g. Desktop)
• In the Key text box, copy and paste your public SSH key from Step 3 to the text box
• Click the Add SSH Key button

5. To check if it works, in Linux shell terminal, type:

ssh -T git@github.com

and type "yes" and the prompt.

6. You should get a message like this:

Hi jimmy2046! You've successfully authenticated, but GitHub does not provide shell access.

 
References:
https://gorails.com/setup/ubuntu/16.04#git