Debian或Ubuntun wget下载证书无法验证

Debian或Ubuntun wget下载证书无法验证，出现如下类似错误：

ERROR: cannot verify URL’s certificate, issued …….’: Unable to locally verify the issuer’s authority.

解决方案：1.增加下载附件参数 –no-check-certificate

2.更新安装根证书

$ sudo apt-get install ca-certificates