MySQL on Arch Linux
TABLE OF CONTENT
Yesterday, I was installing LAMP stack on my local machine to get some work
done. For some weird reasons, I thought I would be able to access the database
root user through a non-root process. Here are some notes about that
just in case I encounter such issues again in future.
First thing first, we need
mysql binary to be able to create and manipulate
databases. Let me get that from Arch Package Repository.
# I am on Arch. So, my package manager is `pacman`. # if you are running Debian(or similar), use `apt` # instead. $ sudo pacman -Syu mariadb
Once the installation process is over, we need to initialize the data directory.
We also need to create system tables.
One of these system databases is
mysql which contains the
mysql.user). This table is responsible for managing user privileges.
We have got a script for this. It is provided by MariaDB. Please note that this script requires to be run as root (or by the superuser).
$ sudo mariadb-install-db --user=mysql --basedir=/usr --datadir=/var/lib/mysql
Start MariaDB Daemon
After running the above command, start MySQL as a system daemon. To do that,
depending on the system, we can use
# for machines having systemd $ sudo systemctl start mariadb.service # starts the service # after starting the service, make sure to `enable` it # so that it automatically starts on reboot $ sudo systemctl enable mariadb.service # check if the process is up and running using $ sudo systemctl status mariadb.service
At this point, the MySQL server should be up and running. To confirm that it is
mysql -u root -p. This will return a password prompt for you to
enter the MySQL password.
Fixing Password Error
Unless you run that command with Super User’s privilege, you are likely to get a
password mismatch error. That’s because a regular user can’t access
root@localhost user (as that is MySQL’s super admin account).
We now have to create a new user for regular MySQL workflow. To create a new
user, first log-in as
sudo (or superuser).
$ sudo mysql -u root -p # This will log you in with a prompt where you can run SQL.
Create New User
To create a new user, we have to perform some SQL black magic in the SQL prompt.
-- replace USERNAME. make sure it's in lowercase CREATE USER 'USERNAME'@'localhost' IDENTIFIED BY 'YOUR_PASSWD';
Create a Database
We need to create a database where
USERNAME will be running database
operations. We are creating it now so that the
USERNAME can be assigned to it
(you can choose to do this step at the end. No issues). So…yeah, more SQL
CREATE DATABASE database_name;
Assign a Database User
Now that we have created a new database, time to assign
USERNAME to take the
control of this database. Some more SQL commands would be sufficient for that.
GRANT ALL PRIVILEGES ON database_name.* TO 'USERNAME'@'localhost'; FLUSH PRIVILEGES;
Once you run all those SQL commands, exit from MariaDB prompt using
Time to verify if we can log in with the newly created user. To do that, we can
log in to MariaDB shell using
mysql -u USERNAME -p (with or without
Enter your password and you will be inside the MariaDB shell. Enjoy!