1. This assumes an SSH keypair exists, usually in ~/.ssh (windows C:\Users<username>.ssh). If not, for help creating one see

https://docs.github.com/en/authentication/connecting-to-github-with-ssh/generating-a-new-ssh-key-and-adding-it-to-the-ssh-agent

or probably just do

ssh-keygen -t ed25519 -C "[email protected]"

give key a name and password, and move files to ~/.ssh/. Then add the .pub contents to a new SSH key through github.com in a browser. 2. This assumes a git repository exists, otherwise create one as usual git init

3. Create a Repository on GitHub

4. Add SSH key to GitHub

5. Add the remote origin from github

git remote add origin [email protected]:<username>/<repo>.git

6. To verify, use

git remote -v

7. Edit your SSH config-file ~/.ssh/config (windows C:\Users\<username>\.ssh\config) and add a Host

Host github.com
  IdentityFile /my/individual/path/id_rsa

8. Edit the git projects config-file .git\config and add in [core]

sshCommand = "ssh -F <path/to/ssh/config/file>"

9. Make sure that your github url is of the form

[remote "origin"]
       url = [email protected]:<username>/<reponame>.git

10. Use git push like usual

git push origin main