*Check access to Github*

You should verify your connection by typing:

|$ ssh -T git@github.com > Hi USERNAME! You’ve successfully authenticated…|

Ref:
docs.github.com/en/authentication/troubleshooting-ssh/error-permission-denied-publickey?platform=linux

*Generating a new SSH key and adding it to the ssh-agent*

Ref:
docs.github.com/en/authentication/connecting-to-github-with-ssh/generating-a-new-ssh-key-and-adding-it-to-the-ssh-agent?platform=linux

*Fix for SSH config: bad configuration option: usekeychain*

Ref: www.unixtutorial.org/ssh-bad-configuration-option-usekeychain/

*Adding a new SSH key to your GitHub account*

Ref:
docs.github.com/en/authentication/connecting-to-github-with-ssh/adding-a-new-ssh-key-to-your-github-account?platform=linux&tool=webui

*About SSH*

Ref:
docs.github.com/en/authentication/connecting-to-github-with-ssh/about-ssh