centos安装mysql出现错误:Failed to start mysqld.service: Unit not found.
首先查找系统中有没有mariadbrpm-qa|grepmariadb然后删除(按照自己查到的目录来)rpm-e--nodeps删完之后再看一眼确保全部删除rpm-qa|grepmariadb之后就可以下载mysql啦wgethttp://repo.mysql.com/mysql-community-release-el7-5.noarch.rpmrpm-ivhmysql-community-re