如何在Linux下安装MySQL8.0

逃离我推掉我的手 2022-12-30 03:55 118阅读 0赞

# 如何在Linux下安装MySQL8.0 #

## 准备工作： ##

mysql8.0 rpm文件

测试工具（比如 idea的database工具）

## 安装步骤： ##

1. 下载mysql的repo源，下载地址：[https://dev.mysql.com/get/mysql80-community-release-el7-1.noarch.rpm][https_dev.mysql.com_get_mysql80-community-release-el7-1.noarch.rpm]

进入Linux系统，输入指令：

wgethttps://dev.mysql.com/get/mysql80-community-release-el7-1.noarch.rpm

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2.安装mysql-community-release-el7-5.noarch.rpm包

输入指令：sudo rpm -ivh mysql80-community-release-el7-1.noarch.rpm

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安装这个包后，会获得两个mysql的yum repo源：/etc/yum.repos.d/mysql-community.repo，/etc/yum.repos.d/mysql-community-source.repo。

3.安装mysql

输入指令：sudo yum install mysql-server

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根据提示安装就可以了,不过安装完成后没有密码,需要重置密码

4. 登录时有可能报这样的错：ERROR2002 (HY000): Can‘t connect to local MySQL server through socket ‘/var/lib/mysql/mysql.sock‘ (2)，原因是/var/lib/mysql的访问权限问题。下面的命令把/var/lib/mysql的拥有者改为当前用户：

输入指令：mysql -u root

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输入指令：sudo chown -R root:root /var/lib/mysql

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输入指令：service mysqld restart

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等重新完成后在输入mysql -u root 就可以看到如下，但是现在又提醒密码错误的信息，输入指令获取随机密码

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生成随机密码

输入指令：grep 'temporary password' /var/log/mysqld.log

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当我去查询用户的时候报这个错误：You must reset your password using ALTER USER statement beforeexecuting this statement

大致意思是说：在执行此语句之前，必须使用ALTE USER语句重设密码。

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然后我执行修改密码的操作：

又报：Your password does not satisfy the current policy requirements

大致意思是说：您的密码不符合当前的策略要求。

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注意：如果只想设置简单密码需要修改两个全局参数：

mysql> set globalvalidate\_password\_policy=0;

mysql> set globalvalidate\_password\_length=1;

（这里我没过试，不知道是否可用，我用的复杂密码）

## 远程连接 ##

1。 改表发。

可能是你的帐号不允许从远程登陆，只能在localhost。这个时候只要在localhost的那台电脑，登入mysql后，更改 "mysql" 数据库里的 "user" 表里的 "host" 项，从"localhost"改成"%"

Sql代码

1.mysql -u root -pvmwaremysql>use mysql;

2.mysql>update user set host = '%' where user = 'root';

3.mysql>select host, user from user;

2. 授权法。

例如，你想myuser使用mypassword从任何主机连接到mysql服务器的话。

Sql代码

1.GRANT ALL PRIVILEGES ON \*.\* TO 'myuser'@'%' IDENTIFIED BY 'mypassword' WITH

GRANT OPTION;

2.FLUSH PRIVILEGES;

如果你想允许用户myuser从ip为192.168.1.6的主机连接到mysql服务器，并使用mypassword作为密码

这里我使用了改表发，执行授权法一直报错，我不知道是不是因为我MySQL8.0的原因。

然后重启服务：service mysqld restart

这里我是使用的idea自带的一个database工具进行测试连接，连接成功。

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到这里，整个MySQL8.0就安装完成了。

[https_dev.mysql.com_get_mysql80-community-release-el7-1.noarch.rpm]: https://dev.mysql.com/get/mysql80-community-release-el7-1.noarch.rpm
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