mysql有关配置

mysql有关配置

mysql安装

1. mysql安装方式有三种

• 源代码：编译安装
• 二进制格式的程序包：展开至特定路径，并经过简单配置后即可使用
• 程序包管理器管理的程序包：
  • rpm：有两种
    • OS Vendor：操作系统发行商提供的
    • 项目官方提供的
  • deb

MySQL配置

#启动mysql并设置开机自动启动
systemctl enable --now mariadb
systemctl status mariadb

#确保3306端口已经监听起来
ss -antl

#在日志文件中找出临时密码
grep "password" /var/log/mysqld.log

#使用获取到的临时密码登录mysql
[root@localhost ~]# mysql -uroot -p
Enter password:     //此处输入密码，可以直接复制你的密码粘贴至此处，也可手动输入
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 2
Server version: 5.7.23

Copyright (c) 2000, 2018, Oracle and/or its affiliates. All rights reserved.

Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

mysql>          //看到有这样的标识符则表示成功登录了

修改密码

[root@localhost ~]# mysql                   #默认是没有密码的，直接回车即可登入
Welcome to the MariaDB monitor.  Commands end with ; or \g.
Your MariaDB connection id is 2
Server version: 5.5.68-MariaDB MariaDB Server

Copyright (c) 2000, 2018, Oracle, MariaDB Corporation Ab and others.

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

MariaDB [(none)]> set password = password('123456');        #设置密码
Query OK, 0 rows affected (0.00 sec)

//修改mysql登录密码
mysql> set global validate_password_policy=0;
Query OK, 0 rows affected (0.00 sec)

mysql> set global validate_password_length=1;
Query OK, 0 rows affected (0.01 sec)

mysql> ALTER USER 'root'@'localhost' IDENTIFIED BY 'wangqing123!';
Query OK, 0 rows affected (0.00 sec)

mysql> quit
Bye