【SSH】初心者必見！SSHキーを作成【秘密鍵と公開鍵】

// ssh確認
ls -al ~/.ssh

// ディレクトリをsshに移動.
cd ~/.ssh

-bash: cd: /Users/User名/.ssh: No such file or directory

// sshディレクトリの作成
mkdir ~/.ssh

// ディレクトリを.sshに移動.
cd ~/.ssh

// 鍵の生成   鍵のタイ   ファイル名
ssh-keygen -t rsa -C メールアドレス@example.com

Generating public/private rsa key ''.
Enter file in which to save the key (/Users/user/.ssh/id_rsa): 

Enter passphrase (empty for no passphrase): 
Enter same passphrase again:

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The default interactive shell is now zsh.
To update your account to use zsh, please run `chsh -s /bin/zsh`.
For more details, please visit https://support.apple.com/kb/HT208050.
MacBook-Pro:~User$ cd ~/.ssh
MacBook-Pro:.ssh User$ ssh-keygen -t rsa -C example@example.com
Generating public/private rsa key ''.
Enter file in which to save the key (/Users/User/.ssh/id_rsa): 
Enter passphrase (empty for no passphrase): 
Enter same passphrase again: 
Your identification has been saved in /Users/User/.ssh/id_rsa.
Your public key has been saved in /Users/User/.ssh/id_rsa.pub.
The key fingerprint is:
SHA256:floBu2kkn47yWNGOK6OpYLir4s9aepNL/5K7Hh0P768 example@example.com
The key's randomart image is:
+---[RSA 3072]----+
|                 |
|                 |
|        .        |
|       . o       |
|      ooS .      |
|.     .O=+ .     |
|o. o..+.Ooo      |
|+.====.=.+       |
|O**==XO.oEo.     |
+----[SHA256]-----+
MacBook-Pro:.ssh User$ 

// 秘密鍵の確認
MacBook-Pro:.ssh User$ ls

id_rsa		
id_rsa.pub

+---[RSA 3072]----+
|                 |
|                 |
|        .        |
|       . o       |
|      ooS .      |
|.     .O=+ .     |
|o. o..+.Ooo      |
|+.====.=.+       |
|O**==XO.oEo.     |
+----[SHA256]-----+
MacBook-Pro:.ssh User$ ls
id_rsa		id_rsa.pub

% pbcopy < ~/.ssh/id_rsa.pub (Macでの取得)
% clip < ~/.ssh/id_rsa.pub (Windowsでの取得)