【shell 每日一练7】一键安装mysql5.7，以及密码及策略修改

[root@uat01 ~]# cat InstallMysql01.sh 
#!/bin/bash
#2018-10-13
#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 ~]# 

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: 5.7.23

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

[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> 

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)

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: 5.7.23 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>