1.致命错误

In many cases, errors from this
library are caused by ssh-agent issues. Try disabling your SSH
agent or removing some keys and try again

查到一个不是解决方案的方案吧An error occurred in the underlying SSH library that Vagrant uses。

vagrant halt
vagrant up --provision

这样启动，后面的一些配置部署都能完成，只不过还是会有【2】里的警告错误。

2.警告错误：

    homestead-7: Warning: Connection reset. Retrying...
    homestead-7: Warning: Remote connection disconnect. Retrying...
    homestead-7: Warning: Connection reset. Retrying...
    homestead-7: Warning: Connection aborted. Retrying...

不影响，只要能正常的启动和配置部署，不用去管。我之前删掉默认的private_key，然后又生成了insecure_private_key，下次再登，还是会警告，暂时没有找到解决方案。