CentOS 7.3 安装MySQL 5.7并修改初始密码

深藏阁楼爱情的钟 2022-05-28 10:46 162阅读 0赞

原文地址：https://www.linuxidc.com/Linux/2017-11/148522.htm?hmsr=toutiao.io

#### 在[CentOS][] 7.3 下安装MySQL 5.7并修改初始密码，Windows下安装MySQL 5.7 见 [http://www.linuxidc.com/Linux/2017-11/148521.htm][http_www.linuxidc.com_Linux_2017-11_148521.htm] ####

#### 1、官方安装文档 ####

[http://dev.mysql.com/doc/mysql-yum-repo-quick-guide/en/][http_dev.mysql.com_doc_mysql-yum-repo-quick-guide_en]

#### 2、下载 Mysql yum包 ####

[http://dev.mysql.com/downloads/repo/yum/][http_dev.mysql.com_downloads_repo_yum]

![171111195049754.png][]

下载到本地再上传到服务器，或者使用wget 直接下载

wget http://repo.mysql.com/mysql57-community-release-el7-10.noarch.rpm

#### 3、安转软件源 ####

将`platform-and-version-specific-package-name` 替换为你下载的rpm名

sudo rpm -Uvh platform-and-version-specific-package-name.rpm

例如

rpm -Uvh mysql57-community-release-el7-10.noarch.rpm

![171111195049753.png][]

#### 4、安装mysql服务端 ####

yum install  -y  mysql-community-server

如果网络环境不是很好，执行完命令就可以去泡杯茶��或者荣耀杀一局

#### 5、启动mysql ####

service mysqld start

systemctl start mysqld.service

#### 6、检查mysql 的运行状态 ####

service mysqld status

systemctl status mysqld.service

#### 7、修改临时密码 ####

Mysql5.7默认安装之后root是有密码的。

#### 7.1 获取MySQL的临时密码 ####

> 为了加强安全性，MySQL5.7为root用户随机生成了一个密码，在error log中，关于error log的位置，如果安装的是RPM包，则默认是/var/log/mysqld.log。   
> 只有启动过一次mysql才可以查看临时密码

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

![171111195049752.png][]   
这里的密码是`YdsGaxOq>2n!`

#### 7.2 登陆并修改密码 ####

使用默认的密码登陆

mysql -uroot -p

用该密码登录到服务端后，必须马上修改密码，不然会报如下错误：

mysql> select @@log_error;
    ERROR 1820 (HY000): You must reset your password using ALTER USER statement before executing this statement.
    mysql>

修改密码

ALTER USER 'root'@'localhost' IDENTIFIED BY 'root123';

如果密码设置太简单出现以下的提示

![171111195049751.png][]

如何解决`ERROR 1819 (HY000): Your password does not satisfy the current policy requirements`呢？ 这里直接提供解决方案文末有详细的说明

必须修改两个全局参数：   
首先，修改validate\_password\_policy参数的值

mysql> set global validate_password_policy=0;

再修改密码的长度

set global validate_password_length=1;

再次执行修改密码就可以了

ALTER USER 'root'@'localhost' IDENTIFIED BY 'root123';

#### 8、授权其他机器登陆 ####

GRANT ALL PRIVILEGES ON *.* TO 'root'@'%' IDENTIFIED BY 'mypassword' WITH GRANT OPTION;
    
    FLUSH  PRIVILEGES;

#### 9、关于密码设置的详细说明 ####

[ERROR 1819 (HY000): Your password does not satisfy the current policy requirements][ERROR 1819 _HY000_ Your password does not satisfy the current policy requirements]

[http://www.linuxidc.com/Linux/2016-01/127831.htm][ERROR 1819 _HY000_ Your password does not satisfy the current policy requirements]

#### 1、官方安装文档 ####

[http://dev.mysql.com/doc/mysql-yum-repo-quick-guide/en/][http_dev.mysql.com_doc_mysql-yum-repo-quick-guide_en]

#### 2、下载 Mysql yum包 ####

[http://dev.mysql.com/downloads/repo/yum/][http_dev.mysql.com_downloads_repo_yum]

![171111195049754.png][]

下载到本地再上传到服务器，或者使用wget 直接下载

wget http://repo.mysql.com/mysql57-community-release-el7-10.noarch.rpm

#### 3、安转软件源 ####

将`platform-and-version-specific-package-name` 替换为你下载的rpm名

sudo rpm -Uvh platform-and-version-specific-package-name.rpm

例如

rpm -Uvh mysql57-community-release-el7-10.noarch.rpm

![171111195049753.png][]

#### 4、安装mysql服务端 ####

yum install  -y  mysql-community-server

如果网络环境不是很好，执行完命令就可以去泡杯茶��或者荣耀杀一局

#### 5、启动mysql ####

service mysqld start

systemctl start mysqld.service

#### 6、检查mysql 的运行状态 ####

service mysqld status

systemctl status mysqld.service

#### 7、修改临时密码 ####

Mysql5.7默认安装之后root是有密码的。

#### 7.1 获取MySQL的临时密码 ####

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

![171111195049752.png][]   
这里的密码是`YdsGaxOq>2n!`

#### 7.2 登陆并修改密码 ####

使用默认的密码登陆

mysql -uroot -p

用该密码登录到服务端后，必须马上修改密码，不然会报如下错误：

mysql> select @@log_error;
    ERROR 1820 (HY000): You must reset your password using ALTER USER statement before executing this statement.
    mysql>

修改密码

ALTER USER 'root'@'localhost' IDENTIFIED BY 'root123';

如果密码设置太简单出现以下的提示

![171111195049751.png][]

如何解决`ERROR 1819 (HY000): Your password does not satisfy the current policy requirements`呢？ 这里直接提供解决方案文末有详细的说明

必须修改两个全局参数：   
首先，修改validate\_password\_policy参数的值

mysql> set global validate_password_policy=0;

再修改密码的长度

set global validate_password_length=1;

再次执行修改密码就可以了

ALTER USER 'root'@'localhost' IDENTIFIED BY 'root123';

#### 8、授权其他机器登陆 ####

GRANT ALL PRIVILEGES ON *.* TO 'root'@'%' IDENTIFIED BY 'mypassword' WITH GRANT OPTION;
    
    FLUSH  PRIVILEGES;

#### 9、关于密码设置的详细说明 ####

[ERROR 1819 (HY000): Your password does not satisfy the current policy requirements][ERROR 1819 _HY000_ Your password does not satisfy the current policy requirements]

[http://www.linuxidc.com/Linux/2016-01/127831.htm][ERROR 1819 _HY000_ Your password does not satisfy the current policy requirements]

[CentOS]: http://www.linuxidc.com/topicnews.aspx?tid=14
[http_www.linuxidc.com_Linux_2017-11_148521.htm]: https://www.linuxidc.com/Linux/2017-11/148521.htm
[http_dev.mysql.com_doc_mysql-yum-repo-quick-guide_en]: http://dev.mysql.com/doc/mysql-yum-repo-quick-guide/en/
[http_dev.mysql.com_downloads_repo_yum]: http://dev.mysql.com/downloads/repo/yum/
[171111195049754.png]: /images/20220528/069a7020b8e4465593b5e3b037788d45.png
[171111195049753.png]: /images/20220528/e6ecff3c7cd54e1491c93052d2a4bdfb.png
[171111195049752.png]: /images/20220528/2b348e3dc8e2453f9e05004be918d8a8.png
[171111195049751.png]: /images/20220528/ddf73e6817af4c1ab7736d4c768d7e2f.png
[ERROR 1819 _HY000_ Your password does not satisfy the current policy requirements]: https://www.linuxidc.com/Linux/2016-01/127831.htm