Mysql---Centos7软件安装

rpm安装

1. 下载rpm

http://dev.mysql.com/get/mysql57-community-release-el7-9.noarch.rpm

2. 安装rpm

rpm -uvh(-ivh) mysql57-community-release-el7-9.noarch.rpm

3. 安装mysql

sudo yum install mysql-community-server

4. 启动mysql

sudo service mysqld start

5. 查看mysql状态

sudo service mysqld status

6. 查看安装过程中生成的默认密码

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

7. 登录mysql

mysql -u root -p

8. 修改mysql默认密码校验规则

如果发现语句无法执行，应该是语句中的空格问题，手打代替粘贴复制。

#密码强度可由validate password strength()函数评估（返回0至100之间的数），如：
mysql>select VALIDATE_PASSWORD_STRENGTH('123456');
mysql>select VALIDATE_PASSWORD_STRENGTH('Password@123456');
#修改方法如下：
set global validate_password_policy=low;
set global validate_password_length=4;
ALTER USER USER() IDENTIFIED BY '123456';

mysql> SHOW VARIABLES LIKE 'validate_password%';
+--------------------------------------+-------+
| Variable_name                        | Value |
+--------------------------------------+-------+
| validate_password_check_user_name    | OFF   |
| validate_password_dictionary_file    |       |
| validate_password_length             | 8     |
| 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日志：

mysql>  select @@log_error;
+---------------------+
| @@log_error         |
+---------------------+
| /var/log/mysqld.log |
+---------------------+
1 row in set (0.00 sec)
mysql>
# grep "password" /var/log/mysqld.log 命令获取MySQL的临时密码

Mysql安装

1、sudo rpm -Uvh platform-and-version-specific-package-name.rpm
2、sudo rpm -Uvh mysql57-community-release-el6-n.noarch.rpm
3、yum repolist all | grep mysql
4、sudo yum install mysql-community-server
5、sudo service mysqld start
6、sudo service mysqld status
7、sudo grep 'temporary password' /var/log/mysqld.log
8、mysql -uroot -p
9、ALTER USER 'root'@'localhost' IDENTIFIED BY 'MyNewPass4!';

其他资源

MySQL入门