mariadb 修改数据库密码（已知原密码）初始化密码开启远程访问权限

小咪咪 2022-12-06 15:21 499阅读 0赞

### 文章目录 ###

*  1. 修改数据库密码（已知原密码）
 *  2. 初始化密码
 *  3. 数据库常规命令
 *  4. 开启远程访问权限
 *   *  4.1 先查看数据库中的访问权限
     *  4. 2 修改访问权限
     *  4.3 刷新权限
 *  5 删除mariadb数据库
 *   *  5.1、卸载mariadb：
     *  5.2、删除配置文件：
     *  5.3、删除数据目录：

# 1. 修改数据库密码（已知原密码） #

进入shell  
mysqladmin -uroot -p原密码 password 新密码

root@a038a278a3db:/var/lib/mysql# mysqladmin -u root -proot password 123456
    root@a038a278a3db:/var/lib/mysql#

然后就可以直接使用`123456`这个密码登陆了

mysql -u root -p123456

# 2. 初始化密码 #

[root@localhost /]# mysql_secure_installation
    
    NOTE: RUNNING ALL PARTS OF THIS SCRIPT IS RECOMMENDED FOR ALL MariaDB
          SERVERS IN PRODUCTION USE!  PLEASE READ EACH STEP CAREFULLY!
    
    In order to log into MariaDB to secure it, we'll need the current password for the root user. If you've just installed MariaDB, and
    you haven't set the root password yet, the password will be blank, so you should just press enter here. Enter current password for root (enter for none): OK, successfully used password, moving on... Setting the root password ensures that nobody can log into the MariaDB root user without the proper authorisation. Set root password? [Y/n] y ##输入y New password: ##输入密码 Re-enter new password: ##输入密码 Password updated successfully! Reloading privilege tables.. ... Success! By default, a MariaDB installation has an anonymous user, allowing anyone to log into MariaDB 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? [Y/n] y ##输入y ... 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? [Y/n] y ##输入y ... Success! By default, MariaDB 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? [Y/n] y ##输入y - 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? [Y/n] y ##输入y ... Success! Cleaning up... All done! If you've completed all of the above steps, your MariaDB
    installation should now be secure.
    
    Thanks for using MariaDB!

进入数据库

[root@localhost /]# mysql -u root -p
    Enter password:  ##输入密码
    Welcome to the MariaDB monitor.  Commands end with ; or \g.
    Your MariaDB connection id is 12
    Server version: 5.5.65-MariaDB MariaDB Server
    
    Copyright (c) 2000, 2018, Oracle, MariaDB Corporation Ab and others.
    
    Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
    
    MariaDB [(none)]>

# 3. 数据库常规命令 #

1.启动数据库 \[root@localhost jdk1.8\]\# systemctl start mariadb  
2.重启数据库 \[root@localhost jdk1.8\]\# systemctl restart mariadb  
3.关闭数据库 \[root@localhost jdk1.8\]\# systemctl stop mariadb

# 4. 开启远程访问权限 #

## 4.1 先查看数据库中的访问权限 ##

现在root的访问权限仅限在本地访问

## 4. 2 修改访问权限 ##

## 4.3 刷新权限 ##

MariaDB [mysql]> flush privileges;
    Query OK, 0 rows affected (0.00 sec)
    
    MariaDB [mysql]>

# 5 删除mariadb数据库 #

## 5.1、卸载mariadb： ##

yum remove mariadb

## 5.2、删除配置文件： ##

rm -f /etc/my.cnf

## 5.3、删除数据目录： ##