一、安裝前準備

查看數據庫版本命令： mysql --version

mysql-community-common-8.0.17-1.el7.x86_64.rpmmysql-community-libs-8.0.17-1.el7.x86_64.rpmmysql-community-client-8.0.17-1.el7.x86_64.rpmmysql-community-server-8.0.17-1.el7.x86_64.rpm

二、安裝RPM包

依次安裝上述RPM包，前后安裝包為依賴關系。

# rpm -ivh mysql-community-common-8.0.17-1.el7.x86_64.rpm# rpm -ivh mysql-community-libs-8.0.17-1.el7.x86_64.rpm# rpm -ivh mysql-community-client-8.0.17-1.el7.x86_64.rpm# rpm -ivh mysql-community-server-8.0.17-1.el7.x86_64.rpm

三、 查詢root賬戶初始密碼

mysql 8.0版本的初始密碼默認非空，安裝時自動生成，存儲在/var/log/mysqld.logzhon中。

# rpm -ivh mysql-community-common-8.0.17-1.el7.x86_64.rpm# rpm -ivh mysql-community-libs-8.0.17-1.el7.x86_64.rpm# rpm -ivh mysql-community-client-8.0.17-1.el7.x86_64.rpm# rpm -ivh mysql-community-server-8.0.17-1.el7.x86_64.rpm

四、修改root密碼

修改密碼默認有安全性要求，對密碼復雜度有控制。

mysql> alter user 'root'@'localhost' identified by 'redhat';ERROR 1819 (HY000): Your password does not satisfy the current policy requirementsmysql> alter user 'root'@'localhost' identified by '1qaz!QAZ';Query OK, 0 rows affected (0.15 sec)mysql> flush privileges;Query OK, 0 rows affected (0.01 sec)

五、查看當前用戶配置信息

mysql> show databases;mysql> use mysql;mysql> select user,host,plugin from user;

六、新建一用戶用于遠程訪問

mysql> create user 'wangwang'@'%' identified by '1qaz!QAZ';Query OK, 0 rows affected (0.08 sec)mysql> grant all on *.* to 'wangwang'@'%';Query OK, 0 rows affected (0.12 sec)mysql> select user,host,plugin from user;

該賬戶的plugin加密方式為caching_sha2_password， MySQL 8.0前的客戶端在連接 MySQL 8.0服務器時會出現 Authentication plugin 'caching_sha2_password' cannot be loaded 的錯誤（需要更該為mysql_native_password）。

七、修改加密方式

修改加密規則

mysql> alter user 'wangwang'@'%' identified by '1qaz!QAZ' password expire never; Query OK, 0 rows affected (0.17 sec)

更新用戶密碼

mysql> alter user 'wangwang'@'%' identified with mysql_native_password by '1qaz!QAZ';Query OK, 0 rows affected (0.04 sec)

保存更改

mysql> flush privileges;Query OK, 0 rows affected (0.05 sec)

查詢信息

mysql> select user,host,plugin from user;