Trying to pull repository docker.io/library/nginx ... Get https://registry-1.docker.io/v2/: x509: certificate signed by unknown authority
配置daemon.json
vim /etc/docker/daemon.json
{
"registry-mirrors": ["https://8f6a79wk.mirror.aliyuncs.com"]
}
原文：https://www.cnblogs.com/wuchangblog/p/14833098.html