环境：centos7

1.创建目录

切换目录：cd /usr/local/

创建目录：mkdir mysql

2.下载mysql

切换目录：cd mysql/

下载mysql：wget https://dev.mysql.com/get/mysql80-community-release-el7-1.noarch.rpm

3.rpm安装mysql

rpm安装mysql：rpm -ivh mysql80-community-release-el7-1.noarch.rpm

4.安装mysql：yum -y install mysql-server

拓展：下载mysql命令：yum search mysql

           安装命令：yum --installroot=/usr/local/mysql --releasever=/ -y install mysql-server

   批量按时间删除文件：find /usr/local/mysql -name "*.*" -mtime -1 -exec rm {} \;

   /usr/local/mysql   ：需要清理的指定目录

  -name "*.*"   ：查找所有文件。若查找某一类，写法：-name "*.jpg*"

  -mtime -1  ：查找1天后的文件，不包含目录。-1代表1天之后，+1代表1天之前。

   -exec ：固定写法

    {} \;  ：一对花括号+空格+\+分号

   注意：若报错“遗漏“-exec”的参数”，请检查命令写法

  批量按照文件大小查找：find . -size -2k -exec ls -l {} \;

5.配置文件

配置文件：vim /etc/my.cnf

日志文件：more /var/log/mysqld.log

服务启动脚本文件：less /usr/lib/systemd/system/mysqld.service

socket文件：vi /var/run/mysqld/mysqld.pid

6.启动服务

切换目录：cd /usr/lib/systemd/system

授权写功能：chmod +x mysqld.service

启动服务：systemctl start mysqld.service

7.设置开机自动启动：systemctl enable mysqld.service

8.查看随机密码：grep "password" /var/log/mysqld.log

9.登录mysql：mysql -u root -p

10.重置密码：alter user 'root'@'localhost' identified by 'Root@123';

11.添加远程授权权限，远程工具可连接：grant all privileges on *.* to 'root'@'%' identified by '密码' with grant option;

出现问题：

解决方法：

CREATE USER 'root'@'%' IDENTIFIED BY '密码';

GRANT ALL ON *.* TO 'root'@'%';

ALTER USER 'root'@'%' IDENTIFIED WITH mysql_native_password BY '密码';
 

12.刷新权限：flush privileges;

13.移除远程访问：revoke all privileges on *.* from root@localhost;

    revoke grant option on *.* from root@localhost;

14.创建表空间、创建分库：create database test;

15.进入数据库：use test;

16.创建表：CREATE TABLE `mytest` (`id` int(7) NOT NULL AUTO_INCREMENT, `name` char(8) DEFAULT NULL, PRIMARY KEY (`id`)) ENGINE=InnoDB AUTO_INCREMENT=10 DEFAULT CHARSET=utf8;

17.显示表：show tables;

18.插入数据：INSERT INTO `mytest` VALUES (1,'sven'),(2,'jim'),(3,'zhu'),(4,'wang'),(5,'ftd'),(6,'test'),(7,'test01'),(8,'test02'),(9,'test03');

19.查询数据：select * from test.mytest;

20.更新mysql中数据：set @RECV = 1;

select @RECV;

update mytest set name = 'qqq' where id = 1;

select @RECV;