参考文章：https://createdpro.com/a/100006
该问题源于文件的版本冲突：
grub2-common包的冲突，所以要将该包使用yum update grub2-commonn命令进行更新。
解决方案：
#yum update grub2-commonn #yum install fwupdate-efi
这是记录在redhat bugzilla上的一个bug
[Linux] CentOS安装GNOME时，fwupdate-efi-12-5.el7.centos.x86_64 conflicts with grub2-common-1:2.02-0.65.el7.centos.noarch
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