配置多个SSH公钥，免密码连接Git服务器

1.首先Mac上预先装有Git和openSSH。

2.通过终端生成公钥

ssh-keygen -t rsa

3.生成GitHub对应的id_rsa_github.pub公钥和id_rsa_github私钥

Enter file in which to save the key (/root/.ssh/id_rsa):/root/.ssh/id_rsa_github  #设置路径,如果不设置默认生成 id_rsa  和  id_rsa.pub

密码可以不设直接回车跳过

按照上面步骤生成Coding对应的id_rsa_coding.pub公钥和id_rsa_coding私钥

4.查看系统ssh-key代理

$ ssh-add -l

如果显示The agent has no identities，表示没有ssh-key 代理
如果有，全部删除

$ ssh-add -D

5.把 .ssh 目录下的私钥添加到ssh-key 代理

$ ssh-add ~/.ssh/id_rsa_github
$ ssh-add ~/.ssh/id_rsa_coding

6.打开ssh 管理页面把对应的公钥保存到代码管理服务器

cat ~/.ssh/id_rsa_github.pub | pbcopy

GitHub增加公钥：https://github.com/settings/keys

cat ~/.ssh/id_rsa_coding.pub | pbcopy

Coding增加公钥：https://coding.net/user/account/setting/keys

7.在 .ssh 目录创建 config 配置文件

vi ~/.ssh/config

输入如下配置信息
#别名需要与Host一致

#github
Host github
    HostName github.com
    User git
    IdentityFile ~/.ssh/id_rsa_github

#coding
Host coding
    HostName git.coding.net
    User git
    IdentityFile ~/.ssh/id_rsa_coding

8.测试

ssh -T github
Hi github! You've successfully authenticated, but GitHub does not provide shel l access.

ssh -T coding
Hello coding! You've connected to Coding.net via SSH successfully!

说明OK。

9.通过设置Host别名克隆项目

对于github帐号下的仓库：

git clone github:githubname/repository.git

(原地址是：git@github.com:githubname/repository.git，替换后应该是：github:githubname/repository.git)
对于coding帐号下的仓库：

git clone coding:codingname/repository.git

(原地址是：git@coding.net:codingname/repository.git，替换后应该是：coding:codingname/repository.git)

10.如果已经使用原地址克隆过了，可以使用命令修改：

git remote set-url origin github:githubname/repository.git