centos8.2安装mysql5.7

1.下载Mysql源文件

wget https://dev.mysql.com/get/mysql57-community-release-el7-11.noarch.rpm

2.安装Mysql源文件

sudo yum localinstall -y mysql57-community-release-el7-11.noarch.rpm

3.检查一下

yum repolist enabled | grep "mysql.*-community.*

4.安装

yum install -y mysql-community-server

遇到了错误
All matches were filtered out by modular filtering for argument: mysql-community-server
Error: Unable to find a match: mysql-community-server

解决方法

sudo yum module disable mysql

重复 yum install -y mysql-community-server

遇到了错误

Public key for mysql-community-client-5.7.38-1.el7.x86_64.rpm is not installed. Failing package is: mysql-community-client-5.7.38-1.el7.x86_64
 GPG Keys are configured as: file:///etc/pki/rpm-gpg/RPM-GPG-KEY-mysql
Public key for mysql-community-common-5.7.38-1.el7.x86_64.rpm is not installed. Failing package is: mysql-community-common-5.7.38-1.el7.x86_64
 GPG Keys are configured as: file:///etc/pki/rpm-gpg/RPM-GPG-KEY-mysql
Public key for mysql-community-libs-5.7.38-1.el7.x86_64.rpm is not installed. Failing package is: mysql-community-libs-5.7.38-1.el7.x86_64
 GPG Keys are configured as: file:///etc/pki/rpm-gpg/RPM-GPG-KEY-mysql
Public key for mysql-community-server-5.7.38-1.el7.x86_64.rpm is not installed. Failing package is: mysql-community-server-5.7.38-1.el7.x86_64
 GPG Keys are configured as: file:///etc/pki/rpm-gpg/RPM-GPG-KEY-mysql
The downloaded packages were saved in cache until the next successful transaction.
You can remove cached packages by executing 'yum clean packages'.
Error: GPG check FAILED

解决方法

sudo rpm --import https://repo.mysql.com/RPM-GPG-KEY-mysql-2022

5.检查

sudo systemctl status mysqld

6.启动

sudo systemctl start mysqld

7.查看临时密码

sudo grep 'temporary password' /var/log/mysqld.log

8.更改密码

mysql> ALTER USER 'root'@'localhost' IDENTIFIED BY 'MyNewPass4!';

ps.直接安装最新版：

sudo dnf -y install @mysql

配置

mysql_secure_installation