進入ssh目錄
cd ~/.ssh

如果有，可以刪掉；如果沒有，會提示No such file or directory

創(chuàng)建
ssh-keygen -t rsa -C "你的郵箱地址"

會提示選擇存儲位置，直接回車即可
Enter file in which to save the key (/Users/hansion/.ssh/id_rsa):
然后會提示你創(chuàng)建了一個目錄

提示設(shè)置ssh的密碼，輸入兩次，并且輸入的時候不會顯示
Enter passphrase (empty for no passphrase):
Enter same passphrase again:

然后會提示存儲位置等信息
Your identification has been saved in /Users/hansion/.ssh/id_rsa.
Your public key has been saved in /Users/hansion/.ssh/id_rsa.pub.

打開ssh文件夾
open ~/.ssh

用xcode等工具打開id_rsa.pub,將里面的全部內(nèi)容復制，添加到Github等網(wǎng)站上即可