一、一键安装Mysql脚本
[root@uat01 ~]# cat InstallMysql01.sh #!/bin/bash#2018-10-13#旅行者-Travel#1.安装wgetyum -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* fiyum-config-manager --disable mysql80-communityyum-config-manager --enable mysql57-communityyum -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 -pEnter password: Welcome to the MySQL monitor. Commands end with ; or /g.Your MySQL connection id is 2Server version: 5.7.23Copyright (c) 2000, 2018, Oracle and/or its affiliates. All rights reserved.Oracle is a registered trademark of Oracle Corporation and/or itsaffiliates. Other names may be trademarks of their respectiveowners.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: 5.7.23 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
| 策略 | 检查规则 |
| 0 or LOW | Length |
| 1 or MEDIUM | Length; numeric, lowercase/uppercase, and special characters |
| 2 or STRONG | Length; numeric, lowercase/uppercase, and special characters; dictionary file |
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> quitBye[root@uat01 ~]# mysql -pEnter password: Welcome to the MySQL monitor. Commands end with ; or /g.Your MySQL connection id is 5Server version: 5.7.23 MySQL Community Server (GPL)Copyright (c) 2000, 2018, Oracle and/or its affiliates. All rights reserved.Oracle is a registered trademark of Oracle Corporation and/or itsaffiliates. Other names may be trademarks of their respectiveowners.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！
注：相关教程知识阅读请移步到MYSQL教程频道。
