root@ubuntu:/home/huzl# mind upgrade
Error response from daemon: Get https://registry-1.docker.io/v2/: x509: certificate signed by unknown authority
exit status 1
I have installed docker and did mind upgrade ,It show "certificate signed by unknown authority"
is there have some certificate file to be download first?
or do there some image to be download by another way?
(may be the network is to be limited by administrator)