系统
Ubuntu 16
安装方式
sudo apt-get install mariadb-server python-pymysql
** 两个疑问 **
- 非系统root不能通过mysql登录
- MariaDB 接受空用户登录, 如何取消? user表没有
求科普, 感激不尽!
** 说明 **
- mysql已确认开启
nginx@nginx-virtual-machine:~$ service mysql status
● mysql.service - LSB: Start and stop the mysql database server daemon
Loaded: loaded (/etc/init.d/mysql; bad; vendor preset: enabled)
Active: active (running) since Wed 2017-09-27 19:17:51 ULAST; 16h ago
Docs: man:systemd-sysv-generator(8)
Process: 29567 ExecStop=/etc/init.d/mysql stop (code=exited, status=0/SUCCESS)
Process: 29603 ExecStart=/etc/init.d/mysql start (code=exited, status=0/SUCCESS)
CGroup: /system.slice/mysql.service
├─29633 /bin/bash /usr/bin/mysqld_safe
├─29777 /usr/sbin/mysqld --basedir=/usr --datadir=/var/lib/mysql --plugin-dir=/usr/lib/m
└─29778 logger -t mysqld -p daemon error
- root登录
nginx@nginx-virtual-machine:~$ sudo mysql -uroot -psqlpass
Welcome to the MariaDB monitor. Commands end with ; or \g.
Your MariaDB connection id is 46
Server version: 10.0.31-MariaDB-0ubuntu0.16.04.2 Ubuntu 16.04
Copyright (c) 2000, 2017, Oracle, MariaDB Corporation Ab and others.
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
MariaDB [(none)]> show databases;
+--------------------+
| Database |
+--------------------+
| information_schema |
| my_test |
| mysql |
| performance_schema |
+--------------------+
4 rows in set (0.00 sec)
MariaDB [(none)]>
- 非root登录
nginx@nginx-virtual-machine:~$ mysql -uroot -psqlpass
ERROR 1698 (28000): Access denied for user 'root'@'localhost'
- root用户, 空用户登录
root@nginx-virtual-machine:/home/nginx# mysql
Welcome to the MariaDB monitor. Commands end with ; or \g.
Your MariaDB connection id is 48
Server version: 10.0.31-MariaDB-0ubuntu0.16.04.2 Ubuntu 16.04
Copyright (c) 2000, 2017, Oracle, MariaDB Corporation Ab and others.
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
MariaDB [(none)]>
但是查询不到默认用户
MariaDB [mysql]> select * from user where 0 = length(User);
Empty set (0.00 sec)
MariaDB [mysql]> select count(1) from user;
+----------+
| count(1) |
+----------+
| 1 |
+----------+
1 row in set (0.00 sec)
通过安全加固删除匿名账户后, 任然可以匿名登录.
nginx@nginx-virtual-machine:~$ sudo 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.
You already have a root password set, so you can safely answer 'n'.
Change the root password? [Y/n] n
... skipping.
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
... 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
... 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
- 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
... 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!
