通过Yum，CentOS 安装MysqL 5.5
rpm -Uvh https://dl.fedoraproject.org/pub/epel/epel-release-latest-6.noarch.rpm rpm -Uvh https://mirror.webtatic.com/yum/el6/latest.rpm yum install MysqL55w MysqL55w-server
如果出现错误
Finished Dependency Resolution Error: MysqL55w-libs conflicts with MysqL-libs-5.1.73-8.el6_8.x86_64 ..
解决方法：
yum install yum-plugin-replace yum replace MysqL-libs --replace-with MysqL55w-libs yum install MysqL55w MysqL55w-server
安装完成启动
service MysqLd start
yum install MysqL.`uname -i` yum-plugin-replace yum replace MysqL --replace-with MysqL55w
