====== OpenSSH on macOS ======

==== 1. How to generate your SSH private key and public key ====
On your macOS ''Terminal'' application, you type the command.
|macOS$ ''ssh-keygen -t ecdsa''| This command generates your SSH private key and public key of the ECDSA type.|
|<code>Enter file in which to save the key (/Users/XXXX/.ssh/id_ecdsa):</code>|This inquiry is where your SSH key will be placed. Do not change.|
|<code>Enter passphrase (empty for no passphrase):</code>|To prevent misuse of your SSH private key, please enter your passphrase in this query. This ''passphrase'' does not have to be the same as your login password.|

Your SSH public key is ''$HOME/.ssh/id_ecdsa.pub''.
Then you register the generated key in your macOS ''keychain'' application<code>
ssh-add -K $HOME/.ssh/id_ecdsa</code>.

==== 2. Optional ====

Create ''$HOME/.ssh/config'' file like the following:<code>
Host *
  ForwardAgent yes
  ForwardX11 yes
  ForwardX11Trusted yes
  IdentityFile /Users/XXXX/.ssh/id_ecdsa
  UseKeychain yes
  AddKeysToAgent yes
</code>Replace ''XXXX'' with your macOS username.
The ''UseKeychain'' is for macOS only.

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