求教centos装xface挂机问题

the2ndface

1. Could not look up internet address for 主机名. This will prevent XFCE from working correctly.
   
2. It may be possible ti correct the problem by adding 主机名 to the file /etc/hosts on your system.

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centos6.8 闲得蛋疼，装了个xface挂vag,前两天还正常，这两天重启的时候就出这个错误，只能手动点继续或者重试。。不点就一直卡在那里，求教！