SSH key 可以让你在你的电脑和Code服务器之间建立安全的加密连接。 先执行以下语句来判断是否已经存在本地公钥：

cat ~/.ssh/id_rsa.pub
如果你看到一长串以 ssh-rsa或 ssh-dsa开头的字符串, 你可以跳过 ssh-keygen的步骤。

提示: 最好的情况是一个密码对应一个ssh key，但是那不是必须的。你完全可以跳过创建密码这个步骤。请记住设置的密码并不能被修改或获取。

你可以按如下命令来生成ssh key：

ssh-keygen -t rsa -C “[email protected]”

命令行输入

bennyrhysdeMacBook-Pro:未命名文件夹 bennyrhys$ ssh-keygen -t rsa -b 4096 -C "[email protected]"
Generating public/private rsa key pair.
Enter file in which to save the key (/Users/bennyrhys/.ssh/id_rsa): 
/Users/bennyrhys/.ssh/id_rsa already exists.
Overwrite (y/n)? y
Enter passphrase (empty for no passphrase): 
Enter same passphrase again: 
Your identification has been saved in /Users/bennyrhys/.ssh/id_rsa.
Your public key has been saved in /Users/bennyrhys/.ssh/id_rsa.pub.
The key fingerprint is:
SHA256:3yj67K+os6l+aaV87q/hYE07vAfirnbT5AYkJY+O5Ao [email protected]
The key's randomart image is:
+---[RSA 4096]----+
|                 |
|  . .            |
|   =             |
| .o o            |
|oo o  . S        |
|E.. o++. . o     |
|o  ooX*.. o .    |
|. ..@+=B..       |
| o+B=XO**o.      |
+----[SHA256]-----+
bennyrhysdeMacBook-Pro:未命名文件夹 bennyrhys$ ls id_rsa_code_aliyun* -a
ls: -a: No such file or directory
ls: id_rsa_code_aliyun*: No such file or directory
bennyrhysdeMacBook-Pro:未命名文件夹 bennyrhys$ ls id_rsa_code_aliyun* -a
ls: -a: No such file or directory
ls: id_rsa_code_aliyun*: No such file or directory
bennyrhysdeMacBook-Pro:未命名文件夹 bennyrhys$ open ~/.ssh

打开文件
id_rsa.pub

复制粘贴到ssh公钥