一、一鍵安裝Mysql腳本
[root@uat01 ~]# cat InstallMysql01.sh
#!/bin/bash
#2018-10-13
#旅行者-Travel
#1.安裝wget
yum -y install wget
#2、下載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 #如果沒有該包，下邊執行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 $NF}'`"
echo "數據庫密碼為:$p1"
fi
[root@uat01 ~]#
二、修改策略和密碼
執行完以上腳本可以看到Mysql的密碼，如下方法登錄修改策略，因為默認密碼要求比較高，可以根據自己需求來決定是否更改策略：
install succefull
數據庫密碼為:9aTRok>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: 5.7.23
Copyright (c) 2000, 2018, 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、數據庫密碼策略：
1、查看數據庫策略：
因為上文已經將 validate_password_length 值改為4，所以下文顯示為4，默認情況下為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、各項值說明
validate_password_policy：密碼安全策略，默認MEDIUM策略
| 策略 |
檢查規則 |
| 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：密碼策略文件，策略為STRONG才需要
validate_password_length：密碼最少長度 ，測試發現最小值得為4。
validate_password_mixed_case_count：大小寫字符長度，至少1個
validate_password_number_count ：數字至少1個
validate_password_special_char_count：特殊字符至少1個
3、修改策略，跟上文第二操作一樣
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、修改簡單密碼測試
mysql> alter user 'root'@'localhost' identified by '1234'; #測試發現密碼長度最少為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: 5.7.23 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 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>
總結
以上所述是小編給大家介紹的一鍵安裝mysql5.7及密碼策略修改方法，希望對大家有所幫助，如果大家有任何疑問歡迎給我留言，小編會及時回復大家大家的！
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