linux（Centos7）下安装mysql8.0.18的教程图解

cd /usr/local
mkdir mysql

tar -xvf mysql-8.0.18-1.el7.x86_64.rpm-bundle.tar

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

mysql-community-common-8.0.15-1.el7.x86_64.rpm，
mysql-community-libs-8.0.18-1.el7.x86_64.rpm
mysql-community-client-8.0.18-1.el7.x86_64.rpm
mysql-community-server-8.0.18-1.el7.x86_64.rpm

rpm -ivh mysql-community-common-8.0.15-1.el7.x86_64.rpm 
 rpm -ivh mysql-community-libs-8.0.18-1.el7.x86_64.rpm
 rpm -ivh mysql-community-client-8.0.18-1.el7.x86_64.rpm
 rpm -ivh mysql-community-server-8.0.18-1.el7.x86_64.rpm

rpm -qa | grep mysql

mysqld --initialize 初始化
chown mysql:mysql /var/lib/mysql -R 授权
systemctl start mysqld 开启mysql服务
systemctl status mysqld 查看mysql 状态

cat /var/log/mysqld.log | grep password 查看root初始密码

mysql -u root -p #回车之后输入前面的初始密码也就是 Iv7fjuP,ucH+（填自己的密码）

ALTER USER "root"@"localhost" IDENTIFIED BY "自己的密码";
FLUSH PRIVILEGES; #立即生效

use mysql;
update user set host = '%' where user ='root'; 
ALTER USER 'root'@'%' IDENTIFIED BY 'password' PASSWORD EXPIRE NEVER; #更改加密方式
ALTER USER 'root'@'%' IDENTIFIED WITH mysql_native_password BY '自己的密码'; #更新用户密码 （我这里为root ）