1、systemctl命令提示错误： Failed to get D-Bus connection: Operation not permitted
重新安装一次systemctl
第一步：备份
mv /usr/bin/systemctl /usr/bin/systemctl.old
第二步:重新安装
curl https://raw.githubusercontent.com/gdraheim/docker-systemctl-replacement/master/files/docker/systemctl.py > /usr/bin/systemctl
第三步：赋权
chmod +x /usr/bin/systemctl