linux下mysql8搭建
環境：centos7
1.建立目錄
切換目錄：cd /usr/local/
建立目錄：mkdir mysql
2.下載mysql
切換目錄：cd mysql/
下載mysql：wget https://dev.mysql.com/get/mysql80-community-release-el7-1.noarch.rpm
3.rpm安裝mysql
rpm安裝mysql：rpm -ivh mysql80-community-release-el7-1.noarch.rpm
4.安裝mysql：yum -y install mysql-server
拓展：下載mysql命令：yum search mysql
安裝命令：yum --installroot=/usr/local/mysql --releasever=/ -y install mysql-server
批量按時間刪除檔案：find /usr/local/mysql -name "*.*" -mtime -1 -exec rm {} \;
/usr/local/mysql ：需要清理的指定目錄
-name "*.*" ：查詢所有檔案。若查詢某一類，寫法：-name "*.jpg*"
-mtime -1 ：查詢1天后的檔案，不包含目錄。-1代表1天之後，+1代表1天之前。
-exec ：固定寫法
{} \; ：一對花括號+空格+\+分號
注意：若報錯“遺漏“-exec”的引數”，請檢查命令寫法
批量按照檔案大小查詢：find . -size -2k -exec ls -l {} \;
5.配置檔案
配置檔案：vim /etc/my.cnf
日誌檔案：more /var/log/mysqld.log
服務啟動指令碼檔案：less /usr/lib/systemd/system/mysqld.service
socket檔案：vi /var/run/mysqld/mysqld.pid
6.啟動服務
切換目錄：cd /usr/lib/systemd/system
授權寫功能：chmod +x mysqld.service
啟動服務：systemctl start mysqld.service
7.設定開機自動啟動：systemctl enable mysqld.service
8.檢視隨機密碼：grep "password" /var/log/mysqld.log
9.登入mysql：mysql -u root -p
10.重置密碼：alter user 'root'@'localhost' identified by 'Root@123';
11.新增遠端授權許可權，遠端工具可連線：grant all privileges on *.* to 'root'@'%' identified by '密碼' with grant option;
出現問題：
解決方法：
CREATE USER 'root'@'%' IDENTIFIED BY '密碼';
GRANT ALL ON *.* TO 'root'@'%';
ALTER USER 'root'@'%' IDENTIFIED WITH mysql_native_password BY '密碼';
12.重新整理許可權：flush privileges;
13.移除遠端訪問：revoke all privileges on *.* from root@localhost;
revoke grant option on *.* from root@localhost;
14.建立表空間、建立分庫：create database test;
15.進入資料庫：use test;
16.建立表：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.顯示錶：show tables;
18.插入資料：INSERT INTO `mytest` VALUES (1,'sven'),(2,'jim'),(3,'zhu'),(4,'wang'),(5,'ftd'),(6,'test'),(7,'test01'),(8,'test02'),(9,'test03');
19.查詢資料：select * from test.mytest;
20.更新mysql中資料：set @RECV = 1;
select @RECV;
update mytest set name = 'qqq' where id = 1;
select @RECV;