wget 下载报错

用wget下载数据库，第一次遇到缺少安装证书的错误。
解决方法：直接选择忽略该证书 --no-check-certificate。
具体报错见下：

wget https://www.drive5.com/sintax/silva_16s_v123.fa.gz
ERROR: cannot verify www.drive5.com's certificate, issued by ‘/C=US/ST=Texas/L=Houston/O=SSL Corporation/CN=SSL.com RSA SSL subCA’:
  Unable to locally verify the issuer's authority.
To connect to www.drive5.com insecurely, use `--no-check-certificate'.
wget --no-check-certificate https://www.drive5.com/sintax/silva_16s_v123.fa.gz