$  ssh-keygen -t rsa -C "你的邮箱"
Generating public/private rsa key pair.
//这里指定秘钥文件路径，直接回车即可
Enter file in which to save the key (/c/Users/my/.ssh/id_rsa):
Created directory ‘/c/Users/my/.ssh‘.
//输入登录密码
Enter passphrase (empty for no passphrase):
Enter same passphrase again:

Your identification has been saved in /c/Users/my/.ssh/id_rsa
Your public key has been saved in /c/Users/my/.ssh/id_rsa.pub
The key fingerprint is:
SHA256:xxxxxexample@gmail.com
The key‘s randomart image is:
+---[RSA 3072]----+
|        .o...=o. |
|        ..  =..  |
|         ..oE .  |
|          oo O   |
|        S B.+ B  |
|         * O * + |
|      o = B X o .|
|     . + = X =   |
|        o.o =    |
+----[SHA256]-----+