centos 命令错误问题记录

     1、运行命令：wget https://ftpmirror.gnu.org/binutils/binutils-2.31.tar.bz2，时出现错误：

    cannot verify ftpmirror.gnu.org's certificate, issued by ‘/C=US/O=Let's Encrypt/CN=R3’:....To connect to gcc.gnu.org insecurely, use `--no-check-certificate'.

    解决：按照提示在后面加： --no-check-certificate