一键安装 Docker
curl -fsSL https://get.docker.com | bash
# 改用国内镜像
# curl -fsSL https://get.docker.com | bash -s docker --mirror AliyunDocker Image Prune
删除所有悬挂的镜像(dangling images)，可以使用以下命令：
docker image prune删除所有未被使用的镜像，可以使用以下命令：
docker image prune -a
#WARNING! This will remove all images without at least one container associated to them.
#Are you sure you want to continue? [y/N] yDocker System Prune
删除所有未被使用的对象，可以使用以下命令：
docker system prune默认情况下将删除：
- Stopped containers – 所有已停止的容器
- Networks that are not being used by at least one container - 所有未被容器使用的网络
- Dangling images - 所有悬挂的镜像
- Dangling build cache - 所有悬挂的构建缓存
docker system prune -a
# WARNING! This will remove:
# - all stopped containers
# - all networks not used by at least one container
# - all images without at least one container associated to them
# - all build cache
# Are you sure you want to continue? [y/N]