解决systemctl不能使用的问题

错误信息:

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

使用以下命令重启即可:

docker run -d --privileged=true -p 5001:22 centos-stage:1 /sbin/init

重启后再重试一下，可以看到问题已经解决了