yum 出现错误

报错如下：

 You could try using --skip-broken to work around the problem
 You could try running: rpm -Va --nofiles --nodigest

解决：   

  yum clean all ：清除缓存目录下的软件包及旧的headers
   rpm --rebuilddb：重建rpm资料库
    yum update:全部更新