前言
有时候Linux下会有多个github的账号，昨天我新申请一个github账号的时候，发现添加ssh-key到github时，有报错信息。：
public_key.verification_failure – imac - f0:25:97:f1:56:39:88:15:a1:72:0c:2d:a8:07:82:59
后来想到，同一个Linux多个github，可能会有问题，所以搜索了下。下面把解决步骤记录下来。
解决步骤
1 用ssh-keygen生成一个新的密钥：
➜ ~ ssh-keygen -t rsa -C "beanli.coder@gmail.com"
Generating public/private rsa key pair.
Enter file in which to save the key (/home/manu/.ssh/id_rsa): /home/manu/.ssh/**id_rsa_me**
➜ ~
2 ssh会读取id_rsa，为了让SSH能够识别该新增key，需要将其添加入SSH agent
ssh-add ~/.ssh/id_rsa_second
单独执行该命令，可能给会有如下错误：
Could not open a connection to your authentication agent.
➜ ~ eval `ssh-agent -s`
Agent pid 4582
➜ ~ ssh-add /home/manu/.ssh/id_rsa_me
Identity added: /home/manu/.ssh/id_rsa_me (/home/manu/.ssh/id_rsa_me)
3 修改~/.ssh/config文件
➜ ~ cat ~/.ssh/config
Host github.com
HostName github.com
PreferredAuthentications publickey
IdentityFile ~/.ssh/id_rsa
Host **me.github.com**
HostName github.com
PreferredAuthentications publickey
IdentityFile ~/.ssh/id_rsa_me
注意，此处id_rsa_me密钥对应的Host为me.github.com，后面git clone 或者 git remote add origin需要使用 git@me.github.com这种地址，详情见第五步
4 将生成的新的密钥文件放入github的账号中
➜ BLOG cat ~/.ssh/id_rsa_me.pub
5 clone github上的repo到本地
➜ BLOG git clone git@me.github.com:Bean-Li/Bean-Li.github.io.git
Cloning into 'Bean-Li.github.io'...
remote: Counting objects: 77, done.
remote: Compressing objects: 100% (60/60), done.
remote: Total 77 (delta 23), reused 60 (delta 7), pack-reused 0
Receiving objects: 100% (77/77), 65.22 KiB | 26 KiB/s, done.
Resolving deltas: 100% (23/23), done.
➜ BLOG
6 对于当前repo设置email 和name
git config user.email "xxxx@xx.com"
git config user.name "xxxx"
从此之后可以正常地修改和使用第二个账号，而第一个账号不受影响