我通过以下方式进入 docker 容器：
docker run -it ubuntu bash
当我在容器中时，我正在安装 Docker：
curl -sSL https://get.docker.com/ | sh
然而，当我开火时，我dockerd得到：
INFO[2020-04-20T11:49:01.220025800Z] stopping event stream following graceful shutdown error="context canceled" module=libcontainerd namespace=plugins.moby
failed to start daemon: Error initializing network controller: error obtaining controller instance: failed to create NAT chain DOCKER: iptables failed: iptables -t nat -N DOCKER: iptables v1.6.1: can't initialize iptables table `nat': Permission denied (you must be root)
Perhaps iptables or your kernel needs to be upgraded.
(exit status 3)
任何想法如何解决这一问题？