一键安装mysql5.7及密码策略修改方法

一、一键安装Mysql脚本

[root@uat01 ~]# cat InstallMysql01.sh

#!/bin/bash

#2022-10-13

#旅行者-Travel

#1.安装wget

yum -y install wget

#2、下载mysql的yum源

URL=”https://repo.mysql.com//mysql80-community-release-el7-1.noarch.rpm”

wget $URL -P /etc/yum.repos.d/

yum -y install yum-utils #如果没有该包，下边执行yum-config-manager不生效

yum -y install /etc/yum.repos.d/mysql80-community-release-el7-1.noarch.rpm

if [ $? -eq 0 ];then

  rm -rf /etc/yum.repos.d/mysql80-community-release-el7-1.noarch*

fi

yum-config-manager –disable mysql80-community

yum-config-manager –enable mysql57-community

yum -y install mysql-community-server

sleep 5

systemctl start mysqld

systemctl enable mysqld

systemctl status mysqld

if [ $? -eq 0 ];then

  echo -e “install succefull”

  result=”`grep ‘temporary password’ /var/log/mysqld.log`”

  p1=”`echo $result |awk ‘{print $NF}’`”

  echo “数据库密码为:$p1”

fi

[root@uat01 ~]#
二、修改策略和密码

执行完以上脚本可以看到Mysql的密码，如下方法登录修改策略，因为默认密码要求比较高，可以根据自己需求来决定是否更改策略：

install succefull

数据库密码为:9aTR&ok>f;1K

[root@uat01 ~]# mysql -uroot -p

Enter password:

Welcome to the MySQL monitor. Commands end with ; or \g.

Your MySQL connection id is 2

Server version: 5.⒎23

Copyright (c) 2000, 2022, Oracle and/or its affiliates. All rights reserved.

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> set global validate_password_policy=0;

Query OK, 0 rows affected (0.00 sec)

mysql> set global validate_password_length=4;

Query OK, 0 rows affected (0.00 sec)

mysql> alter user ‘root’@’localhost’ identified by ‘Yanglt123.’;

Query OK, 0 rows affected (0.00 sec)

mysql> flush privileges;

Query OK, 0 rows affected (0.00 sec)

mysql> quit


三、数据库密码策略：


1、查看数据库策略：

因为上文已经将 validate_password_length 值改为4，所以下文显示为4，默认情况下为8

[root@uat01 ~]# mysql -uroot -p

…..

Server version: 5.⒎23 MySQL Community

……

mysql> show variables like ‘validate_password%’;

+————————————–+——-+

| Variable_name      | Value |

+————————————–+——-+

| validate_password_check_user_name | OFF |

| validate_password_dictionary_file |  |

| validate_password_length    | 4  |

| validate_password_mixed_case_count | 1  |

| validate_password_number_count  | 1  |

| validate_password_policy    | LOW |

| validate_password_special_char_count | 1  |

+————————————–+——-+

7 rows in set (0.00 sec)

mysql>
2、各项值说明

validate_password_policy：密码安全策略，默认MEDIUM策略

validate_password_dictionary_file：密码策略文件，策略为STRONG才需要

validate_password_length：密码最少长度 ，测试发现最小值得为4。

validate_password_mixed_case_count：大小写字符长度，至少1个

validate_password_number_count ：数字至少1个

validate_password_special_char_count：特殊字符至少1个

3、修改策略，跟上文第二操作一样

mysql> set global validate_password_policy=0;

Query OK, 0 rows affected (0.00 sec)

mysql> set global validate_password_length=4;

Query OK, 0 rows affected (0.00 sec),

mysql> flush privileges;

Query OK, 0 rows affected (0.00 sec)4、修改简单密码测试

mysql> alter user ‘root’@’localhost’ identified by ‘1234’; #测试发现密码长度最少为4位

Query OK, 0 rows affected (0.00 sec)

mysql> flush privileges;

Query OK, 0 rows affected (0.01 sec)

mysql> quit

Bye

[root@uat01 ~]# mysql -p

Enter password:

Welcome to the MySQL monitor. Commands end with ; or \g.

Your MySQL connection id is 5

Server version: 5.⒎23 MySQL Community Server (GPL)

Copyright (c) 2000, 2022, Oracle and/or its affiliates. All rights reserved.

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>

总结

以上所述是小编给大家介绍的一键安装mysql5.7及密码策略修改方法，希望对大家有所帮助，如果大家有任何疑问欢迎给我留言，小编会及时回复大家大家的！