docker-machine ls报了以下错误
Unable to query docker version: Get https://192.168.99.101:2376/v1.15/version: x509: certificate has expired or is not yet valid
很明显，证书过期了。
docker-machine ls报了以下错误
Unable to query docker version: Get https://192.168.99.101:2376/v1.15/version: x509: certificate has expired or is not yet valid
很明显，证书过期了。