CentOS 7 更新内核至3.16.2

参考：http://ljf.me/archives/use-yum-to-quickly-upgrade-centos-6-5-kernel-3-10-28php 1.打开http://elrepo.org/tiki/tiki-index.phphtml 根据相应版本提示执行命令：centos sudo rpm --import https://www.elrepo.org/RPM-GPG-KEY

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