python_tutorials/g04_git_ssh_main2master.txt at master · lselector/python_tutorials · GitHub

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# --------------------------------------------------------------
The default branch name for new GitHub repositories
is not "master", it is now "main":

https://github.com/github/renaming

I still want to use "master".
So when I create a new repo, I rename
in browser rename from main to master.

Then locally run these commands:

git branch -m main master
git fetch origin
git branch -u origin/master master
git remote set-head origin -a

# --------------------------------------------------------------
Note - in 2021 GitHub switched their authentication rules.

Now you should use SSH.

You can add SSH key to your account or to a specific repository
(may be to a repo which is not yours, but you have access).

# --------------------------------------------------------------
Here how to add to your account

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

ssh-keygen -t ed25519 -C "your_email@example.com"

/Users/you/.ssh/github_myname/id_ed25519_github

eval "$(ssh-agent -s)"

open ~/.ssh/config

Host *
  AddKeysToAgent yes

Host github.com
  User myuser
  HostName github.com
  IdentityFile ~/.ssh/github_myname/id_ed25519_github
  UseKeychain yes
  IdentityFile ~/.ssh/id_ed25519_github

# -------------------------------------
# Then copy/paste public key into Github website:

https://docs.github.com/en/authentication/connecting-to-github-with-ssh/adding-a-new-ssh-key-to-your-github-account

# -------------------------------------
# Then switch the remote locally:

cd your_local_repo_dir
git remote set-url origin git@github.com:YouUser/YouRepo.git

git remote -v
origin  git@github.com:YouUser/YouRepo.git (fetch)
origin  git@github.com:YouUser/YouRepo.git (push)

git branch
* master
# -------------------------------------
Note: to add a new key to a company's private repo,
follow instructions here:
  https://cloud.redhat.com/blog/private-git-repositories-part-2a-repository-ssh-keys

Basically you need to generate the key pair

   ssh-keygen -t ed25519 -C "first.last@gmail.com"

For example, you created these two keys:

    $HOME/.ssh/github_myproject/github_id_ed25519
    $HOME/.ssh/github_myproject/github_id_ed25519.pub

Then you update the .ssh/config file:

Host github.com
  User githubuser
  HostName github.com
  IdentityFile /home/azureuser/.ssh/github_myproject/github_id_ed25519
  IdentitiesOnly yes

Host *
  AddKeysToAgent yes

Then login in github, go to the repo, click on settings (gear),
then on the left click on "Deploy keys",
and the on right-top click on "Add deploy key"
then follow instructions to paste the public key.
# -------------------------------------