删除原有的mysql,如果之前安装过

1 查看rpm中mysql相关的包,并删之:

rpm -qa | grep -i mysql | xargs rpm -e --nodeps 

2 删除mysql相关目录:

find / -name mysql | grep -E '/usr|/var' | xargs rm -r

rpm版安装步骤

1 获取下载链接

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2 下载和安装

1 wget https://dev.mysql.com/get/mysql80-community-release-el7-3.noarch.rpm
2 rpm -ivh mysql80-community-release-el7-3.noarch.rpm
3 yum install mysql-server -y

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3 安装完成,查看:

 which mysql
 mysql --version

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4 运行:mysqld --user=root or mysqld
查看状态:systemctl status mysqld


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