MySQL（8.0）数据库安装和初始化以及管理

1.MySQL下载安装和初始化

1.下载安装包

下载地址：https://downloads.mysql.com/archives/get/p/23/file/mysql-8.0.33-1.el7.x86_64.rpm-bundle.tar

wget https://downloads.mysql.com/archives/get/p/23/file/mysql-8.0.33-1.el7.x86_64.rpm-bundle.tar

2.解压

[root@mysql ~]# tar -xf mysql-8.0.33-1.el7.x86_64.rpm-bundle.tar

3.安装依赖包

yum -y mysql-community-libs-8.0.33-1.el7.x86_64.rpm
yum install mysql-community-client-8.0.33-1.el7.x86_64.rpm
yum -y install mysql-community-common-8.0.33-1.el7.x86_64.rpm
yum install -y mysql-community-server-8.0.33-1.el7.x86_64.rpm

4.卸载mariadb

yum remove -y *mariadb

5.初始化mysql

mysqld -initialize

6.启动服务并设置开机自启

systemctl start mysqld.service

7.获得初始化密码

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

root@localhost:后面就是初始化后的密码，记下初始密码。

8.使用初始密码登录

mysql -uroot -p

输入初始密码登录mysql

9.设置密码

在mysql内将密码修改为root，方便记忆的密码都可以。

ALTER USER 'root'@'localhost' IDENTIFIED WITH mysql_native_password BY 'root';

10.修改远程权限

create user 'root'@'%' identified with mysql_native_password by 'root';  #创建用户
grant all privileges on *.* to 'root'@'%' with grant option;   #修改权限
flush privileges   #激活