1 检查是否安装过

 

MySQL

rpm -qa | grep -i mysql

mariadb

rpm -qa | grep mariadb

2 卸载之前的安装

MySQL

rpm -e --nodeps 软件名 //强力删除，对相关依赖的文件也进行强力删除

卸载

rpm -e --nodeps mariadb-libs-5.5.60-1.el7_5.x86_64

3 官网下载

MySQL :: Download MySQL Community Server

mysql-community-client-8.0.32-1.el7.x86_64.rpm
mysql-community-client-plugins-8.0.32-1.el7.x86_64.rpm
mysql-community-common-8.0.32-1.el7.x86_64.rpm
mysql-community-libs-8.0.32-1.el7.x86_64.rpm
mysql-community-icu-data-files-8.0.32-1.el7.x86_64.rpm
mysql-community-server-8.0.32-1.el7.x86_64.rpm

4 安装客户端(mysql-client)

rpm -ivh rpm包

4.1 安装mysql-community-common-8.0.32

rpm -ivh mysql-community-common-8.0.32-1.el7.x86_64.rpm

4.2 安装mysql-community-client-plugins-8.0.32

rpm -ivh mysql-community-libs-8.0.32-1.el7.x86_64.rpm  --force --nodeps

4.3 安装mysql-community-libs-8.0.32

rpm -ivh mysql-community-client-plugins-8.0.32-1.el7.x86_64.rpm

4.4 安装mysql-community-client-8.0.32(前面是其依赖)

rpm -ivh mysql-community-client-8.0.32-1.el7.x86_64.rpm

4.5 安装mysql-community-icu-data-files-8.0.32

rpm -ivh mysql-community-icu-data-files-8.0.32-1.el7.x86_64.rpm

4.6 安装 mysql-community-icu-data-files-8.0.32

rpm -ivh mysql-community-icu-data-files-8.0.32-1.el7.x86_64.rpm

5 安装服务端(mysql-server)

rpm -ivh mysql-community-server-8.0.32-1.el7.x86_64.rpm

6 查看是否安装成功

有以下方式查看：

• ps -ef | grep mysql

• cat /etc/group | grep mysql

• cat /etc/password | grep mysql

• mysqladmin --version

7 初始化mysql

初始化之前可以修改 /etc/my.cnf 文件配置文件路径

mysqld --initialize //创建数据文件目录和mysql系统数据库 产生随机root密码

8 /var/lib/mysql目录权限授权

chown -R mysql:mysql /var/lib/mysql/

9 启动mysql服务

systemctl start mysqldps -ef | grep mysql //查看mysql服务

10 查看初始化随机生成的root密码

cat /var/log/mysqld.log | grep password

11 安全设置

mysql_secure_installation

12 重置密码(Mysql8.0+有变化)

先把root的旧密码置空

use mysql;update user set authentication_string='' where user='root';

备注：Mysql5.7+ password字段 已改成 authentication_string字段
重置成新密码

alter user 'root'@'localhost' identified by 'newpassword';

备注：Mysql8.0修改密码方式已有变化(此处是个坑，需要注意)

Mysql8.0之前：

update user set password=password('root') where user='root';

13 允许远程连接

use mysql;update user set host = '%' where user = 'root';flush privileges;

参考：

• mysql8 rpm安装_CentOS8 安装 MySQL8.0（RPM）