yum install docker -y
yum erase podman buildah
sudo yum-config-manager \
service docker start
curl -sSL https://get.daocloud.io/daotools/set_mirror.sh | sh -s http://f1361db2.m.daocloud.io
$ systemctl cat docker | grep '\-\-registry\-mirror'
service docker start
docker pull python:3.9.10
docker images
docker save python:39.10 > /root/python.tar
docker rmi python:3.9.10
docker images
docker run -it --name=p1 python:3.9.10 bash
docker start p1
docker pause p1
docker unpause p1
docker exec -it p1 bash
docker stop p1
doker rm p1
docker rm p1
来源：【2020新课程】Docker构建Python web环境-NEXT学院×腾讯云大学_哔哩哔哩_bilibili
镜像加速器 - Docker — 从入门到实践 (gitbook.io)
