ssh key管理

How to Generate an SSH Key 

1. From the Terminal or Git Bash, run ssh-keygen
2. Confirm the default path .ssh/id_rsa
3. Enter a passphrase (recommended) or leave it blank.
   Remember this passphrase, as you will need it to unlock the
   key whenever you use it.
4. Open ~/.ssh/id_rsa.pub and copy & paste the contents into
   the box below, then click on "Add".
   Note that id_rsa.pub is your public key and can be shared,
   while id_rsa is your private key and should be kept secret.

生成ssh key后 需要应用 得经过如下两步 引入下私钥

chmod 600 ～/.ssh/id_rsa

ssh-add ~/.ssh/id_rsa