ssh config examples - multiple identity files

ssh_config_notes

AddKeysToAgent ask

# Managing multiple github keys with host entries and defaults with exclusions
# Test with: 
# ssh -T git@asdf
# ssh -T [email protected]
Host github.com
  UseKeychain yes
  AddKeysToAgent yes
  IdentityFile ~/.ssh/id_rsa
  HostName github.com
  User git
  IdentitiesOnly yes
Host asdf
  UseKeychain yes
  AddKeysToAgent yes
  IdentityFile ~/.ssh/github-asdf
  HostName github.com
  User git
  IdentitiesOnly yes
# Example default with exclusion for specific host entries
Host * !asdf
  UseKeychain yes
  AddKeysToAgent yes
  IdentityFile ~/.ssh/id_rsa
# Apparently you can define multiple match strings per Host separated by spaces and ! is the exclusionary



# https://stribika.github.io/2015/01/04/secure-secure-shell.html
# This should be last as a default
HOST *
    USER my_default_username
#     KexAlgorithms [email protected],diffie-hellman-group-exchange-sha256
#     PasswordAuthentication no
#     ChallengeResponseAuthentication no
#     PubkeyAuthentication yes
#     HostKeyAlgorithms [email protected],[email protected],ssh-ed25519,ssh-rsa
#     Ciphers [email protected],[email protected],[email protected],aes256-ctr,aes192-ctr,aes128-ctr
#     MACs [email protected],[email protected],[email protected],hmac-sha2-512,hmac-sha2-256,[email protected]
#     UseRoaming no