how to slove that Cannot connect to the Docker daemon at unix:///var/run/docker.sock. Is the docker daemon running?

[ZhenWusi]

sudo docker build -t tf_colmap:latest . ERROR: Cannot connect to the Docker daemon at unix:///var/run/docker.sock. Is the docker daemon running? root@autodl-container-f1da119ffa-8feb8b24:~/autodl-tmp/LLFF# sudo iptables -L iptables v1.8.4 (legacy): can't initialize iptables table `filter': Permission denied (you must be root) Perhaps iptables or your kernel needs to be upgraded. root@autodl-container-f1da119ffa-8feb8b24:~/autodl-tmp/LLFF# sudo systemctl status docker System has not been booted with systemd as init system (PID 1). Can't operate. Failed to connect to bus: Host is down