리눅스에서 wget(또는 curl)을 사용하여 https 사이트에 접근 시, [root@c78-test ~]# wget https://test.com/down/abc.tar.gz --2022-02-03 21:26:19-- https://test.com/down/abc.tar.gz Resolving test.com (test.com)… 113.211.235.125 Connecting to test.com (test.com)|113.211.235.125|:443… connected. ERROR: cannot verify test.com's certificate, issued by ‘/C=US/O=Let's Encrypt/CN=R3’: Issued certificate has expired. To connect to