CentOS7安装MySQL5.7密码查看与修改 - MySQL中文参考手册
2019-09-11 阅读 : 次
CentOS7 安装 Mysql 5.7密码查看与修改软件版本
CentOS release 6.9 (Final)mysql Client Ver 14.14 Distrib 5.7.18, for Linux (x86_64) using EditLine wrappermysql Server 5.7.18
检测是否安装MySQLServer
检测下系统有没有自带的mysql:yum list installed | grep mysql
如果已经有的话执行命令 yum -y remove mysql-libs.x86_64 卸载已经安装的 MySQL 。
安装
使用 rpm 包进行mysql服务器的安装,具体下载地址在:https://dev.mysql.com/downloads/mysql/5.7.html#downloads
wget http://repo.mysql.com/yum/mysql-5.7-community/el/6/x86_64/mysql-community-server-5.7.18-1.el6.x86_64.rpmrpm -ivh mysql-community-server-5.7.18-1.el6.x86_64.rpm
启动
service mysqld start
查看密码
安装完成之后会自动在 /var/log/mysqld.log 中生成连接的密码, 使用
grep "temporary password" /var/log/mysqld.log 命令查看生成的密码。
初次登录MySQL客户端必须重新设置密码才能进行数据的操作,如下:
[root@localhost src]# mysql -uroot -pEnter password:Welcome to the MySQL monitor. Commands end with ; or /g.Your MySQL connection id is 7Server version: 5.7.18Copyright (c) 2000, 2017, 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> show databases;ERROR 1820 (HY000): You must reset your password using ALTER USER statement before executing this statement.
密码设置
不过需要注意的是现在MySQL已经强制要求强密码,已经不能再用弱密码比如“123456”了。如果你设置的密码过于简单,会提示错误:
ERROR 1819 (HY000): Your password does not satisfy the current policy requirements
set password 命令
SET PASSWORD FOR 'root'@'localhost' = PASSWORD('newpass');
mysqladmin 命令
mysqladmin -u root password "newpass" # 如果root没有设置密码使用这种方式mysqladmin -u root password oldpass "newpass" # 如果root设置了密码使用这种方式
使用 update 语句
UPDATE user SET authentication_string = PASSWORD('newpass') WHERE user = 'root';
忘记密码
mysqld_safe --skip-grant-tables&mysql -u root mysqlmysql> UPDATE user SET authentication_string=PASSWORD("new password") WHERE user='root';mysql> FLUSH PRIVILEGES;
密码复杂度的修改
mysql> show variables like "validate_password%";+--------------------------------------+--------+| Variable_name | Value |+--------------------------------------+--------+| validate_password_check_user_name | OFF || validate_password_dictionary_file | || validate_password_length | 8 | # 必须8个字符以上| validate_password_mixed_case_count | 1 || validate_password_number_count | 1 || validate_password_policy | MEDIUM | # 具体看下面的配置| validate_password_special_char_count | 1 |+--------------------------------------+--------+7 rows in set (0.01 sec)mysql> SET GLOBAL validate_password_policy='LOW';Query OK, 0 rows affected (0.00 sec)mysql> SET GLOBAL validate_password_length = 6;Query OK, 0 rows affected (0.00 sec)
LOW政策只测试密码长度。 密码必须至少有8个字符长。
MEDIUM政策的条件 密码必须包含至少1数字字符,1 大写和小写字符,和1特别 (nonalphanumeric)字符。
STRONG政策的情况 密码子字符串长度为4的或更长时间不能匹配 单词在字典文件中,如果一个人被指定。
再进行密码的修改试试。
创建用户并授权
CREATE USER 'test'@'%' IDENTIFIED BY 'password';GRANT ALL ON test.* TO 'test'@'%' WITH GRANT OPTION;
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