本文环境：CentOS7，安装包放在/home/mysql
https://downloads.mysql.com/archives/community/
下载地址：https://downloads.mysql.com/archives/get/p/23/file/mysql-5.7.32-1.el7.x86_64.rpm-bundle.tar
或者直接在Linux上wget https://downloads.mysql.com/archives/get/p/23/file/mysql-5.7.32-1.el7.x86_64.rpm-bundle.tar
1、安装新版mysql前，需将系统自带的mariadb-lib卸载，rpm -qa|grep mariadb
rpm -e --nodeps mariadb-libs-5.5.68-1.el7.x86_64
2、解压
cd /home/mysql
tar -xvf /home/mysql/mysql-5.7.32-1.el7.x86_64.rpm-bundle.tar
3、安装
rpm -ivh mysql-community-common-5.7.32-1.el7.x86_64.rpm
rpm -ivh mysql-community-libs-5.7.32-1.el7.x86_64.rpm
rpm -ivh mysql-community-client-5.7.32-1.el7.x86_64.rpm
rpm -ivh mysql-community-server-5.7.32-1.el7.x86_64.rpm --force --nodeps
注：如果不带 --force --nodeps，可能发生下面错误
4、修改配置文件t添加下面内容，vi /etc/my.cnf
skip-grant-tables
character_set_server=utf8
init_connect=‘SET NAMES utf8‘
说明：
skip-grant-tables：跳过登录验证
character_set_server=utf8：设置默认字符集UTF-8
init_connect=‘SET NAMES utf8‘：设置默认字符集UTF-8
5、启动服务
设置开机启动
进入mysql，mysql
6、设置密码，update mysql.user set authentication_string=password(‘123456‘) where user=‘root‘;
刷新权限，flush privileges;
7、退出mysql，重启mysql
exit;
systemctl stop mysqld.service
systemctl start mysqld.service
8、重新连接mysql，mysql -uroot -p123456