ssh keys 无密码访问 github

操作环境：Ubuntu

生成一对 SSH key

1

$ ssh-keygen -t rsa -C "your_email@example.com"

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

Enter passphrase (empty for no passphrase): [Press enter]

Enter same passphrase again: [Press enter]

将公钥添加到 github 账户

• 打开并复制本地文件　/Users/you/.ssh/“your_ssh_name.pub”　里面的内容
• github 账户　——> settings ——> SSH keys ——> Add SSH key ——> 粘贴复制的内容

注意

• 不同github账号不能共用一对SSH key
• 需重新生成一对，详见【拓展】
• 相同github账号可以添加多对SSH key
• 不同终端(OS User Account)下可以使用相同的SSH key
• 在生成同名SSH key后用原来的SSH key内容覆盖即可
• 相同终端下可以添加多对SSH key

【拓展】一个PC终端用户配置多个github账户的SSH key

(1) 按照１和２的步骤生成对应github账户的多对SSH key

(2) 新增或配置~/.ssh/config，内容示例：

Host github-first
HostName github.com
 User git
 IdentityFile ~/.ssh/id_rsa_first


Host github-second
 HostName github.com
 User git
 IdentityFile ~/.ssh/id_rsa_second


Host github-third
 HostName github.com
 User git
 IdentityFile ~/.ssh/id_rsa_third

(3) 配置克隆仓库目录下的.git/config，内容示例：

[core]
	repositoryformatversion = 0
	filemode = true
	bare = false
	logallrefupdates = true
[remote "origin"]
	url = git@github-first:hopehook1/test.git
	fetch = +refs/heads/*:refs/remotes/origin/*

[core]
	repositoryformatversion = 0
	filemode = true
	bare = false
	logallrefupdates = true
[remote "origin"]
	url = git@github-second:hopehook2/test.git
	fetch = +refs/heads/*:refs/remotes/origin/*

[core]
	repositoryformatversion = 0
	filemode = true
	bare = false
	logallrefupdates = true
[remote "origin"]
	url = git@github-third:hopehook3/test.git
	fetch = +refs/heads/*:refs/remotes/origin/*

(4) 特别说明：

• github根据配置文件的user.email来获取github帐号显示author信息，所以对于多帐号用户一定要记得将user.email改为相应的email(如：second@mail.com)
• 测试`~/.ssh/config`配置情况：
  • `ssh -T git@github-first`
  • `ssh -T git@github-second`
  • `ssh -T git@github-third`
• 执行git clone [URL]的时候，[URL]原样写入`.git/config`的url (HTTPS和SSH方式)
  • 例如： git clone git@github-second:hopehook2/test.git的时候`.git/config`的url = git@github-second:hopehook2/test.git