mysql安装完成后的操作

灰太狼 2022-01-10 02:37 250阅读 0赞

1、下载mysqltar包之后，使用ftp工具上传到服务器，解压缩

tar xf mysql-5.7.26-1.el7.x86_64.rpm-bundle.tar

2、使用yum批量安装

yum -y install ./mysql*.rpm

3、启动mysql服务

systemctl start mysqld

4、通过过滤mysql的日志文件，找出临时密码

grep password /var/log/mysqld.log
    
    2019-06-20T13:30:52.136848Z 1 [Note] A temporary password is generated for root@localhost: #<glakty8TWB
    
    密码：#<glakty8TWB

5、登录mysql，修改密码

修改mysql的配置文件，关闭密码审计策略
    validate-password=off
    
    重启mysqld服务器
    systemctl restart mysqld
    
    使用临时密码登录mysql
    mysql -uroot -p'#<glakty8TWB' -A   #密码有特殊符号，使用单引号引起来
    
    修改密码
    alter user user() identified by '123456';

6、修改数据库的默认字符集

修改配置文件my.cnf
    character_set_server = utf8

7、mysql安全优化向导

执行的命令：mysql_secure_installation
    
    Securing the MySQL server deployment.
    
    Enter password for user root:
    The 'validate_password' plugin is installed on the server.
    The subsequent steps will run with the existing configuration
    of the plugin.
    Using existing password for root.
    
    Estimated strength of the password: 0  #安全审计的密码长度为0
    Change the password for root ? ((Press y|Y for Yes, any other key for No) : no #是否需要修改密码
    
     ... skipping.
    By default, a MySQL installation has an anonymous user,
    allowing anyone to log into MySQL without having to have
    a user account created for them. This is intended only for
    testing, and to make the installation go a bit smoother.
    You should remove them before moving into a production
    environment.
    
    Remove anonymous users? (Press y|Y for Yes, any other key for No) : yes  #是否需要移除匿名用户
    Success.
    
    
    Normally, root should only be allowed to connect from
    'localhost'. This ensures that someone cannot guess at
    the root password from the network.
    
    Disallow root login remotely? (Press y|Y for Yes, any other key for No) : yes #是否禁止root用户远程登录
    Success.
    
    By default, MySQL comes with a database named 'test' that
    anyone can access. This is also intended only for testing,
    and should be removed before moving into a production
    environment.
    
    
    Remove test database and access to it? (Press y|Y for Yes, any other key for No) : yes #是否删除默认测试库
     - Dropping test database...
    Success.
    
     - Removing privileges on test database...
    Success.
    
    Reloading the privilege tables will ensure that all changes
    made so far will take effect immediately.
    
    Reload privilege tables now? (Press y|Y for Yes, any other key for No) : yes #是否立即刷新权限
    Success.
    
    All done!

8、mysql5.7版本跳过密码验证，修改密码

在my.cnf配置文件中，增加如下参数：
    
    skip-grant-tables
    
    保存重启mysqld服务
    
    systemctl restart mysqld
    
    修改密码
    update user set authentication_string=password('123456') where user='root';