使用systemctl 命令报错

Authorization not available. Check if polkit service is running or see debug message for more information.

查看polkit状态是失败的状态，报缺少libstdc++.so.6

systemctl status polkit

需要安装libstdc++.so.6库

先加载所有安装包

yum repolist

查看哪个安装包包含该库

yum provides libstdc++.so.6

输出可以看到

可以看到安装包libstdc++-4.8.5-39.el7.i686

yum -y install libstdc++-4.8.5-39.el7.i686

报错

glibc = 2.17-222.el7 is needed by (installed) glibc-headers-2.17-222.el7.x86_6

安装glibc-headers-dev

yum install glibc-headers

然后

yum -y install libstdc++-4.8.5-39.el7.i686

systemctl start polkit

现在systemctl命令可以正常使用了