同一个电脑配置多个ssh key以及配置完成后git拉取或更新代码仍要输入密码问题的解决

1.配置多个ssh key

以两个账号为例：

[email protected]对应gitee的远程仓库

[email protected]对应github的远程仓库

1.1.在~/.ssh目录下分别生成两个账号的ssh key

使用ssh-keygen -t rsa -C "[email protected]"不要一直回车，

在第一个提示出输入key文件的名字，剩下两个提示直接回车，最后提示公匙和私匙保存在你命名的key文件中

ming@ming-TM1604:~/.ssh$ ssh-keygen -t rsa -C "[email protected]"
Generating public/private rsa key pair.
Enter file in which to save the key (/home/ming/.ssh/id_rsa): id_rsa_gitee_user1            
Enter passphrase (empty for no passphrase): 
Enter same passphrase again: 
Your identification has been saved in id_rsa_gitee_user1.
Your public key has been saved in id_rsa_gitee_user1.pub.
The key fingerprint is:
SHA256:aaaaaaaaaaaaaaaaaaaaaaaaa [email protected]
The key's randomart image is:
+---[RSA 2048]----+
...
+----[SHA256]-----+
ming@ming-TM1604:~/.ssh$ ls
id_rsa_gitee_user1  id_rsa_gitee_user1.pub  known_hosts 

使用同样的步骤在.ssh文件夹中生成[email protected]的key

ming@ming-TM1604:~/.ssh$ ls
id_rsa_gitee_user1  id_rsa_gitee_user1.pub  id_rsa_github_user2  id_rsa_github_user2.pub  known_hosts

1.2.将密匙添加到ssh agent中

默认只读取id_rsa，为了让ssh识别新的私钥，需将其添加到ssh agent中：

ming@ming-TM1604:~/.ssh$ ssh-add id_rsa_gitee_user1
Identity added: id_rsa_gitee_user1 (id_rsa_gitee_user1)
ming@ming-TM1604:~/.ssh$ ssh-add id_rsa_github_user2
Identity added: id_rsa_github_user2 (id_rsa_github_user2)

1.3.创建配置文件

在.ssh文件中创建文件名为config，无后缀

在config中分别配置两个ssh key的信息

#github配置
Host github-user2
    HostName github.com
    PreferredAuthentications publickey
    IdentityFile ~/.ssh/id_rsa_github_user2
    User ming
#gitee配置
Host gitee-user1
    HostName gitee.com
    PreferredAuthentications publickey
    IdentityFile ~/.ssh/id_rsa_gitee_user1
    User ming

1.4.测试

如下则表示配置成功

ming@ming-TM1604:~/.ssh$ ssh -T [email protected]
Welcome to Gitee.com, user1!
ming@ming-TM1604:~/.ssh$ ssh -T [email protected]
Warning: Permanently added the RSA host key for IP address '52.74.223.119' to the list of known hosts.
Hi RidingACodeToStray! You've successfully authenticated, but GitHub does not provide shell access.

注：取消全局用户和邮箱配置

git config --global --unset user.name
git config --global --unset user.email

在不同仓库配置用户和邮箱

git config user.name "yourname" 
git config user.email "youremail"

2.关于配置ssh key拉取或更新代码仍要输入邮箱密码的问题

可能由于之前拉取代码使用的url是https方式，该方式会要求用户认证，ssh地址的时候才会采用ssh认证

进入仓库的.git文件夹，打开里面的config文件编辑，将

[remote "origin"]
	url = https://gitee.com/xx/xxxx.git
	fetch = +refs/heads/*:refs/remotes/origin/*

改为

[remote "origin"]
	url = [email protected]:xx/xxxx.git
	fetch = +refs/heads/*:refs/remotes/origin/*