ssh key添加到ssh-agent测试连接报错

ssh -T git@github.com

如下报错，说明是~/.ssh/config文件问题
.ssh/config: line 5: Bad configuration option: usekeychain
修改配置文件解决问题，完整流程看这里
Mac系统如下

Host new
  HostName github.com
  AddKeysToAgent yes
  UseKeychain yes
  IdentityFile ~/.ssh/id_rsa_new
  User test

Host old
  HostName github.com
  AddKeysToAgent yes
  UseKeychain yes
  IdentityFile ~/.ssh/id_rsa
  User test

Win系统如下

Host new
HostName github.com
IdentityFile C:\\Users\Eric\.ssh\id_rsa_new
PreferredAuthentications publickey
User Eric

Host old
HostName github.com
IdentityFile C:\\Users\Eric\.ssh\id_rsa
PreferredAuthentications publickey
User Eric