Answers for "use ssh key with github"

add ssh key to github

$ ls -al ~/.ssh
# Lists the files in your .ssh directory, if they exist

github use key

Host github.com
 HostName github.com
 IdentityFile ~/.ssh/id_rsa_github

github how to add ssh key

Host *
  AddKeysToAgent yes
  UseKeychain yes
  IdentityFile ~/.ssh/id_rsa