开始
官网，点击 DOCUMENTATION，点击 MySQL 8.0Reference Manual，点击 Installing and Upgrading MySQL，点击Installing MySQL on Linux，最后点击 version，选择你的安装版本
本次使用2.5.1 Installing MySQL on Linux Using the MySQL Yum Repository安装方式
配置存储库
MySQL Yum 存储库页面 ( dev.mysql.com/downloads/r… )
下载
wget https://repo.mysql.com//mysql80-community-release-el7-5.noarch.rpm
对于基于 EL7 的系统执行
sudo yum install mysql80-community-release-el7-5.noarch.rpm
选择发布系列
# 查看 MySQL Yum 存储库
[root@rabbitmq2 home]# yum repolist all | grep mysql
#开启5.7
[root@rabbitmq2 home]# sudo yum-config-manager --enable mysql57-community
#关闭8.0
[root@rabbitmq2 home]# sudo yum-config-manager --disable mysql80-community
#验证是否启用和禁用了正确的子存储库
#可见mysql是57版本
[root@rabbitmq2 home]# yum repolist enabled | grep mysql
mysql-connectors-community/x86_64 MySQL Connectors Community 230
mysql-tools-community/x86_64 MySQL Tools Community 138
mysql57-community/x86_64 MySQL 5.7 Community Server 564
安装 MySQL
[root@rabbitmq2 home]# sudo yum install -y mysql-community-server
xxx
Installed:
mysql-community-libs.x86_64 0:5.7.37-1.el7 mysql-community-libs-compat.x86_64 0:5.7.37-1.el7 mysql-community-server.x86_64 0:5.7.37-1.el7
Dependency Installed:
mysql-community-client.x86_64 0:5.7.37-1.el7 mysql-community-common.x86_64 0:5.7.37-1.el7
Replaced:
mariadb-libs.x86_64 1:5.5.68-1.el7
Complete!
这将安装 MySQL 服务器的软件包 ( mysql-community-server) 以及运行服务器所需的组件的软件包，包括客户端的软件包 ( mysql-community-client)、客户端和服务器的常见错误消息和字符集 ( mysql-community-common) 以及共享的客户端库 ( mysql-community-libs) .
启动 MYSQL
sudo service mysqld start
查看状态
# running表示启动成功
[root@rabbitmq2 home]# sudo service mysqld status
Redirecting to /bin/systemctl status mysqld.service
● mysqld.service - MySQL Server
Loaded: loaded (/usr/lib/systemd/system/mysqld.service; enabled; vendor preset: disabled)
Active: active (running) since Mon 2022-03-21 08:42:03 EDT; 46s ago
Docs: man:mysqld(8)
http://dev.mysql.com/doc/refman/en/using-systemd.html
Process: 2858 ExecStart=/usr/sbin/mysqld --daemonize --pid-file=/var/run/mysqld/mysqld.pid $MYSQLD_OPTS (code=exited, status=0/SUCCESS)
Process: 2809 ExecStartPre=/usr/bin/mysqld_pre_systemd (code=exited, status=0/SUCCESS)
Main PID: 2861 (mysqld)
CGroup: /system.slice/mysqld.service
└─2861 /usr/sbin/mysqld --daemonize --pid-file=/var/run/mysqld/mysqld.pid
Mar 21 08:41:59 rabbitmq2 systemd[1]: Starting MySQL Server...
Mar 21 08:42:03 rabbitmq2 systemd[1]: Started MySQL Server.
重置密码
#查看初始密码
[root@rabbitmq2 home]# sudo grep 'temporary password' /var/log/mysqld.log
2022-03-21T12:42:00.698412Z 1 [Note] A temporary password is generated for root@localhost: (b0_P>VhGils
#登录
[root@rabbitmq2 home]# mysql -uroot -p
Enter password: (b0_P>VhGils
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 2
#当前版本
Server version: 5.7.37
Copyright (c) 2000, 2022, Oracle and/or its affiliates.
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
#修改密码
mysql> ALTER USER 'root'@'localhost' IDENTIFIED BY 'MyNewPass4!';
Query OK, 0 rows affected (0.00 sec)
#输入quit退出
mysql> quit
登录
[root@rabbitmq2 home]# mysql -uroot -p
#输入新密码
Enter password: MyNewPass4!
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 3
Server version: 5.7.37 MySQL Community Server (GPL)
Copyright (c) 2000, 2022, Oracle and/or its affiliates.
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
mysql>
解决
# 1130 Host is not allowed to connect to this MySQL server
mysql> use mysql;
Reading table information for completion of table and column names
You can turn off this feature to get a quicker startup with -A
Database changed
mysql> update user set host = '%' where user = 'root';
Query OK, 1 row affected (0.00 sec)
Rows matched: 1 Changed: 1 Warnings: 0
mysql> FLUSH PRIVILEGES;
Query OK, 0 rows affected (0.00 sec)
