一直试图让 Ubuntu 识别 GeoTrust SAN 证书，但没有运气。浏览器工作正常。帮助？
$ openssl s_client -showcerts -connect artsyapi.com:443
CONNECTED(00000003)
depth=0 businessCategory = Private Organization, 1.3.6.1.4.1.311.60.2.1.3 = US, 1.3.6.1.4.1.311.60.2.1.2 = Delaware, serialNumber = 4660944, C = US, ST = New York, L = New York, O = Artsy Inc., CN = artsy.net
verify error:num=20:unable to get local issuer certificate
verify return:1
depth=0 businessCategory = Private Organization, 1.3.6.1.4.1.311.60.2.1.3 = US, 1.3.6.1.4.1.311.60.2.1.2 = Delaware, serialNumber = 4660944, C = US, ST = New York, L = New York, O …