multi-users4git

ssh-keygen -t rsa -C "user1@gamil.com" -f ~/.ssh/github_rsa

ssh-keygen -t ed25519 -C "user2@intel.com" -f ~/.ssh/github_ed25519

edit ~/.ssh/config

  # user1 Github
  Host user1@github.com
    PreferredAuthentications publickey
    IdentityFile ~/.ssh/github_rsa

  # user2 Github
  Host user2@github.com
    PreferredAuthentications publickey
    IdentityFile ~/.ssh/github_ed25519
 
git config --global --list
 
git config --global --unset user.name
git config --global --unset user.email

git config --global --list
 
git config user.name="user1"
git config user.email="user1@xxx.com"