[root@WEB-APP-REP-MASTER ~]# reboot
Error getting authority: Error initializing authority: Error calling StartServiceByName for org.freedesktop.PolicyKit1: GDBus.Error:org.freedesktop.DBus.Error.TimedOut: Activation of org.freedesktop.PolicyKit1 timed out (g-dbus-error-quark, 20)
Could not watch jobs: Connection timed out
Failed to open /dev/initctl: No such device or address
Failed to talk to init daemon.
可能是由于systemd版本过低导致的
解决办法：
1.重启服务器
2.升级systemd ： yum update systemd 或者下载源码包编译安装