1.如果已经安装MySQL或MariaDB，先卸载一下

yum search mysql
yum remove mariadb.x86_64

2.下载rpm包加载一下

官网 https://dev.mysql.com/downloads/repo/yum/

下载对应操作系统的安装包，我虚拟机是CentOS7我就拿这个了，可以换版本

上传到服务器，然后加载一下

yum localinstall mysql80-community-release-el7-7.noarch.rpm

找一下软件包的名称

yum search mysql

mysql-community-server.x86_64 : A very fast and reliable SQL database server

3.直接yum安装

yum -y install mysql-community-server.x86_64

4.启动，状态，自启

systemctl start mysqld
systemctl status mysqld
systemctl enable mysqld

5.登录，改密码，刷权限

先找root默认密码

grep 'password' /var/log/mysqld.log

2022-09-03T04:09:27.258187Z 6 [Note] [MY-010454] [Server] A temporary password is generated for root@localhost: HDpk:pkAJ5)A

登录

mysql -uroot -p
Enter password: HDpk:pkAJ5)A

第一步必须改密码，它不给其他操作，整复杂一点，刷完要退出重新登录一下

mysql> ALTER USER USER() IDENTIFIED BY 'XXxxxxx1234567,,.';

刷远程登录权限，正常root是不给远程登录的，我这只是个虚拟机简单省事就拉倒了

mysql> use mysql;
mysql> select user, host from user;
+------------------+-----------+
| user             | host      |
+------------------+-----------+
| mysql.infoschema | localhost |
| mysql.session    | localhost |
| mysql.sys        | localhost |
| root             | localhost |
+------------------+-----------+

mysql> update user set host='%' where user='root';
mysql> flush privileges;
mysql> select user, host from user where user = 'root';
+------+------+
| user | host |
+------+------+
| root | %    |
+------+------+

6.别忘了防火墙放端口

firewall-cmd --zone=public --add-port=3306/tcp --permanent
systemctl restart firewalld

7.连接测试

8.如果连接报 public key retrieval is not allowed

就改一下连接属性

allowPublicKeyRetrieval=true
useSSL=false

配置什么的

配置文件

cat /etc/my.cnf

datadir=/var/lib/mysql
socket=/var/lib/mysql/mysql.sock
log-error=/var/log/mysqld.log
pid-file=/var/run/mysqld/mysqld.pid

bin-log

mysql> show variables like '%log_bin%';
+---------------------------------+-----------------------------+
| Variable_name                   | Value                       |
+---------------------------------+-----------------------------+
| log_bin                         | ON                          |
| log_bin_basename                | /var/lib/mysql/binlog       |
| log_bin_index                   | /var/lib/mysql/binlog.index |
| log_bin_trust_function_creators | OFF                         |
| log_bin_use_v1_row_events       | OFF                         |
| sql_log_bin                     | ON                          |
+---------------------------------+-----------------------------+