一、檢查SSH key是否存在

在終端輸入：

ls -al ~/.ssh

如果沒有，終端顯示如下：

No such file or directory

如果已經存在，則會顯示id_rsa和id_rsa.pub

二、生成新的SSH key

在終端輸入：

ssh-keygen -t rsa -C "[email protected]"

其中[email protected]為你在Github註冊時的郵箱

成功後終端顯示如下：

Generating public/private rsa key pair.

Enter file in which to save the key (/Users/xxx/.ssh/id_rsa):

提示你儲存.ssh/id_rsa的路徑，這裡直接enter

Created directory '/Users/xxx/.ssh'.

Enter passphrase (empty for no passphrase):

提示輸入passphrase，每次與Github通訊都會要求輸入passphrase，以避免某些“失誤”，建議輸入

成功後終端顯示：

Your identification has been saved in /Users/xxx/.ssh/id_rsa.

Your public key has been saved in /Users/xxx/.ssh/id_rsa.pub.

The key fingerprint is:

16:27:ac:a5:76:28:2d:36:63:1b:56:4d:eb:df:a6:48 [email protected]

The key's randomart image is:（後面圖形省略）

三、新增key到SSH

輸入命令：

ssh-add ~/.ssh/id_rsa

此時會要求輸入passphrase，輸入步驟二中填的passphrase

成功後，終端顯示：

Identity added: /Users/xxx/.ssh/id_rsa (/Users/xxx/.ssh/id_rsa)

最後，在/Users/xxx/.ssh/生成兩個檔案，id_rsa和id_rsa.pub

此時，SSH key已經生成成功

四、新增SSH key到Github

1.複製id_rsa.pub中的所有內容

開啟id_rsa.pub，終端命令：

vim ~/.ssh/id_rsa.pub

手動複製以ssh-rsa到以[email protected]結尾的所有內容

或者直接輸入命令複製id_rsa.pub中的所有內容，終端命令：

pbcopy < ~/.ssh/id_rsa.pub

2.登入Github

打開個人Settings-->SSH keys-->Add SSH key

Title 隨便寫

Key 貼上之前複製的內容

這樣SSH key就新增的Github

五、檢測SSH key

輸入命令：

ssh [email protected]

此時會驗證SSH key是否可以訪問Gitbub

成功顯示如下：

Hi your_name! You've successfully authenticated, but GitHub does not provide shell access.

Connection to github.com closed.