添加 ruby-china https 源报错: SSL_connect returned=1 errno=0 state=SSLv3 read server certificate B:certificate verify failed(https://gems-ruby-china.b0.upaiyun.com/specs.4.8.gz)

测试证书 openssl s_client -connect gems.ruby-china.org:443 -CAfile /etc/ssl/certs/ca-certificates.crt 得到结果：Verify return code: 0 (ok)

openssl s_client -connect gems-ruby-china.b0.upaiyun.com:443 -CAfile /etc/ssl/certs/ca-certificates.crt 得到结果：Verify return code: 10 (certificate has expired)

调整服务器时间就 ok 了