Download and installation of the latest version of MySQL 8.0 under Linux (detailed steps)

前言

本篇文章基于Linux 环境下载与安装MySQL 8.0,像基于win 10The system is installed in the same way as the offline version（安装简单）,If there is no remote server,You can install a virtual machine on your computer
Create a virtual machine tutorial for details：http://t.csdn.cn/IFAJN
基于Win 10系统下载与安装MySQL 8.0教程详见：http://t.csdn.cn/WyDAv
For details on the installation tutorial of the Connecting Virtual Machine Tool：http://t.csdn.cn/XVy6u

一、下载MySQL

MySQL官网：https://www.mysql.com/cn/
MySQL 8.0下载地址：https://dev.mysql.com/downloads/mysql/
Select your own virtual machine to installLinux版本,下载

二、安装MySQL

1.解压文件

Just right click and unzip it,It will decompress a lot .rpm文件

2.上传文件

Upload the selected files below

使用Xftp工具,上传至 /opt文件夹,If the upload status is wrong,Then turn off the virtual machine firewall and give the folder the highest permissions：chmod -R 777 /opt

3.检查依赖

3.1、检查 /tmp临时目录权限

MySQL安装过程中,会通过MySQL用户在 /tmp目录下新建tmp_db文件,所以给 /tmpFolder highest permissions：chmod -R 777 /tmp

3.2、检查依赖

检查libaio：rpm -qa|grep libaio

检查net-tools：rpm -qa|grep net-tools

如果不存在需要到CentOS安装盘里进行rpm安装,If it is installed with a graphical interface,这些都是安装好的

4.安装

Install the uploaded files one by one（Strictly enforced）

rpm -ivh mysql-community-common-8.0.29-1.el8.x86_64.rpm
rpm -ivh mysql-community-client-plugins-8.0.29-1.el8.x86_64.rpm
rpm -ivh mysql-community-libs-8.0.29-1.el8.x86_64.rpm
rpm -ivh mysql-community-client-8.0.29-1.el8.x86_64.rpm
rpm -ivh mysql-community-server-8.0.29-1.el8.x86_64.rpm

在安装（server）Dependency detection failed：

在后面增加 --force --nodeps 忽略依赖关系

rpm -ivh mysql-community-server-8.0.29-1.el8.x86_64.rpm --force --nodeps

成功安装

5.查看版本

查看指令：mysql --version

3、使用MySQL

1.初始化服务

为了保证数据库目录与文件的所有者为mysql登录用户,如果是以root 身份运行mysql服务,Then execute the command initialization：mysqld --initialize --user=mysql

会为root用户生成一个密码,After logging in, you need to set a new password,The generated temporary password is recorded in the log
查看密码：cat /var/log/mysqld.log

2.查看服务是否启动

命令：systemctl status mysqld

If the service is not started, start the service：systemctl start mysqld

如果启动成功,Then the installation is no problem

3.查看服务

查看进程：ps -ef | grep -i mysql

查看服务是否自启动：systemctl list-unit-files|grep mysqld.service

默认就是enabled
设置自启动：systemctl enable mysqld.service
The setting does not start automatically：systemctl disable mysqld.service

4.登录

登录（Enter the temporary password）：mysql -u root -p

5.修改密码

如果不修改密码,无法操作数据库：alter user 'root'@'localhost' identified by '新密码'
修改密码之后,Log back in and view the database：show databases;

Offline version so farLinux系统安装Mysql 8.0安装成功,操作简单,The master-slave library will be built later,Then use the command line to install online

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