giovedì 19 luglio 2012

How-To create a MySQL database and set privileges to a user

MySQL is a widely spread SQL database management system mainly used on LAMP (Linux/Apache/MySQL/PHP) projects.
In order to be able to use a database, one needs to create: a new database, give access permission to the database server to a database user and finally grant all right to that specific database to this user.
This tutorial will explain how to create a new database and give a user the appropriate grant permissions.
For the purpose of this tutorial, I will explain how to create a database and user for the music player Amarok. In order to index its music collection, Amarok quand use a mysql backend.
The requirement for this set up is to have access to a database. We are going to create a database called amarok which will be accessible from localhost to useramarok idetified by the password amarok....
Obviously, we need to to have a mysql server installed as well as amarok:
$ sudo apt-get install mysql-server amarok
On a default settings, mysql root user do not need a password to authenticate from localhost. In this case, ou can login as root on your mysql server using:
$ mysql -u root
If a password is required, use the extra switch -p:
$ mysql -u root -p
Enter password:
Now that you are logged in, we create a database:
mysql> create database amarokdb;
Query OK, 1 row affected (0.00 sec)
We allow user amarokuser to connect to the server from localhost using the password amarokpasswd:
mysql> grant usage on *.* to amarokuser@localhost identified by 'amarokpasswd';
Query OK, 0 rows affected (0.00 sec)
And finally we grant all privileges on the amarok database to this user:
mysql> grant all privileges on amarokdb.* to amarokuser@localhost ;
Query OK, 0 rows affected (0.00 sec)
And that's it. You can now check that you can connect to the MySQL server using this command:
$ mysql -u amarokuser -p'amarokpasswd' amarokdb
Your MySQL connection id is 12
Server version: 5.0.38-Ubuntu_0ubuntu1-log Ubuntu 7.04 distribution

Type 'help;' or '\h' for help. Type '\c' to clear the buffer.


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