> sudo systemctl start httpd

System has not been booted with systemd as init system (PID 1). Can't operate.
Failed to connect to bus: Host is down

解决办法：

apt install python2
 
sudo mv /usr/bin/systemctl /usr/bin/systemctl.old
curl https://gitee.com/missyoyo/docker-systemctl-replacement/raw/master/files/docker/systemctl.py >temp
sudo mv temp /usr/bin/systemctl
sudo chmod +x /usr/bin/systemctl