Membuat user dan Database (MariaDB) Pada Linux Debian

Kenapa kita perlu membuat user selain root pada database ? Hal ini diperlukan untuk keamanan pada database. Dikarenakan tidaklah mungkin membuat database dengan semua akun root, hal ini sangat berbahaya. Maka dari itu kita perlu membuat user khusus untuk database tertentu agar meminimalisir kecerobohan.

Langkah 1 :

# apt install mariadb-server mariadb-client
apt install mariadb-server mariadb-client
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
The following additional packages will be installed:
  mariadb-plugin-provider-bzip2 mariadb-plugin-provider-lz4 mariadb-plugin-provider-lzma
  mariadb-plugin-provider-lzo mariadb-plugin-provider-snappy
Suggested packages:
  mailx mariadb-test netcat-openbsd
The following NEW packages will be installed:
  mariadb-client mariadb-plugin-provider-bzip2 mariadb-plugin-provider-lz4
  mariadb-plugin-provider-lzma mariadb-plugin-provider-lzo mariadb-plugin-provider-snappy
  mariadb-server
0 upgraded, 7 newly installed, 0 to remove and 0 not upgraded.
Need to get 6,713 kB of archives.
After this operation, 120 MB of additional disk space will be used.
Do you want to continue? [Y/n] Y

Langkah 2 :

Setelah melakukan instalasi dilanjutkan dengan mengaktikan MariaDB :

 # 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
haven't set the root password yet, you should just press enter here.

Enter current password for root (enter for none):
OK, successfully used password, moving on...

Setting the root password or using the unix_socket ensures that nobody
can log into the MariaDB root user without the proper authorisation.

You already have your root account protected, so you can safely answer 'n'.

Switch to unix_socket authentication [Y/n] n
 ... skipping.

You already have your root account protected, 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!

Langkah 3 :

Kondisi seperti ini mysql / mariadb dalam akun root tidak menggunakan password pada saat kita login , nah kondisi seperti ini menurut saya tidak baik dan sangat berbahaya, maka dari itu saya akan memberikan password pada akun root mysql / mariaDB.

# mysql -uroot -p
Enter password:
Welcome to the MariaDB monitor.  Commands end with ; or \g.
Your MariaDB connection id is 39
Server version: 10.11.4-MariaDB-1~deb12u1 Debian 12

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)]> ALTER USER root@localhost IDENTIFIED VIA mysql_native_password;
Query OK, 0 rows affected (0.021 sec)

MariaDB [(none)]> FLUSH PRIVILEGES;
Query OK, 0 rows affected (0.001 sec)

MariaDB [(none)]> SET PASSWORD = PASSWORD('passwordbaru');
Query OK, 0 rows affected (0.017 sec)

MariaDB [(none)]> FLUSH PRIVILEGES;
Query OK, 0 rows affected (0.000 sec)

Maka ketika kita login dengan perintah mysql -uroot -p (jika tanpa password maka akan error, maka dari itu inputkan password yaitu passwordbaru)

Langkah 4 :

Membuat user pada mariaDB / mySQL adalah sebagai berikut :

mysql -uroot -p
Enter password:
Welcome to the MariaDB monitor.  Commands end with ; or \g.
Your MariaDB connection id is 40
Server version: 10.11.4-MariaDB-1~deb12u1 Debian 12

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)]> CREATE USER 'admin'@'localhost' IDENTIFIED BY 'passworduser';
Query OK, 0 rows affected (0.017 sec)

MariaDB [(none)]> FLUSH PRIVILEGES;
Query OK, 0 rows affected (0.001 sec)

Langkah 5 :

Membuat database :

# mysql -uroot -p
Enter password:
Welcome to the MariaDB monitor.  Commands end with ; or \g.
Your MariaDB connection id is 41
Server version: 10.11.4-MariaDB-1~deb12u1 Debian 12

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)]> Create database  kampus;
Query OK, 1 row affected (0.000 sec)

MariaDB [(none)]> FLUSH PRIVILEGES;
Query OK, 0 rows affected (0.001 sec)

MariaDB [(none)]>

Langkah 6 :

Memberikan hak akses pada user :

# mysql -uroot -p
Enter password:
Welcome to the MariaDB monitor.  Commands end with ; or \g.
Your MariaDB connection id is 44
Server version: 10.11.4-MariaDB-1~deb12u1 Debian 12

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)]> GRANT ALL PRIVILEGES ON kampus.* TO 'admin'@'localhost';
Query OK, 0 rows affected (0.015 sec)

MariaDB [(none)]> FLUSH PRIVILEGES;
Query OK, 0 rows affected (0.001 sec)

Langkah 7 :

Melihat hak akses user :

MariaDB [(none)]> SHOW GRANTS FOR 'admin'@'localhost';

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