CentOS7.2+MySQL5.7_ yum源方式_ 安装配置教程

1）访问mysql官方网站

#访问网站

https://dev.mysql.com/downloads/file/?id=470281

2）下载安装包到linux

#进入文件存放路径

cd /usr/local/src

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

3）下载以rpm方式安装mysql的yum源

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

4）检查mysql的yum源

#检查mysql的yum repo源是否可用

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

5）以yum方式安装mysql

#安装mysql

yum -y install mysql-commuinty-server

#如上提示表示安装成功

6）启动mysql服务

#启动mysql服务

systemctl start mysqld

7）设置开机启动

#设置开机自动启动

systemctl enable mysqld

systemctl daemon-reload

8）设置mysql的root密码

#获取登录MySQL的root用户临时密码

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

利用临时密码，访问mysql

alter user 'root'@'localhost' identified by 'chineseA@123/#';

[root@centos7129 opt]# mysql -uroot -p

Enter password: 临时密码

mysql> alter user 'root'@'localhost' identified by 'chineseA@123/#';

#更改密码策略

mysql> show variables like '%password';

set global validate_password_policy=0;

set global validate_password_length=4;

#再次重置密码

mysql> alter user 'root'@'localhost' identified by '123456';

#新增1个test用户，可远程访问mysql

mysql> grant all privileges on *.* to 'test'@'%' identified by '123456' with grant option;

9）配置mysql支持的字符集

#在[mysqld]配置项中，添加支持utf-8编码

vim /etc/my.cnf

character-set-server=utf8mb4

collation-server=utf8mb4_unicode_ci

init_connect='SET NAMES utf8mb4'

#重启mysql

systemctl restart mysqld

10）重新设置mysql的root密码（在第8步骤不成功时）

#登录后出现如下错误：

ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: YES)

#则在/etc/my.cnf的[msyqld]项中新增 skip-grant-tables

#重启mysql

systemctl restart mysqld

#mysql -uroot -p

Enter password：原密码

mysql>use mysql;

mysql>update user set authentication_string=password("123456") where user="root";

mysql>flush privileges;

mysql>exit;

#然后再将/etc/my.cnf的[msyqld]项中的skip-grant-tables注释

#再重启mysql

systemctl restart mysqld

#如果出现该问题

failed: Access denied for user 'root'@'192.168.0.129' (using password: YES) at ./mysqlreport line 249

可先在配置文件 /etc/my.cnf中，新增如下内容

[client]

host=localhost

user=xxx

password=xxx

重启数据库后

在执行该语句

mysql>INSERT INTO `user` VALUES ('%','root','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','','','','',0,0,0,0,'mysql_native_password','*6BB4837EB74329105EE4568DDA7DC67ED2CA2AD9','N',LOCALTIME(),NULL,'N');

mysql>flush privileges;

之后再注释以下配置项

/etc/my.cnf中

[client]

host=localhost

user=xxx

password=xxx

11）列出mysql常见路径配置项

#配置文件路径 /etc/my.cnf

#日志文件路径 /var/log/mysqld.log

#mysql启动脚本 /usr/lib/systemd/system/mysqld.service

#socket文件路径 /var/lib/mysql/mysql.sock

#pid文件 /var/run/mysqld/mysqld.pid