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How to Change Root Password of MySQL or MariaDB in Linux
If you’re installing MySQL or MariaDB in Linux for the first time, chances are you will be executing mysql_secure_installation script to secure your MySQL installation with basic settings.
One of these settings is, database root password – which you must keep secret and use only when it is required. If you need to change it (for example, when a database administrator changes roles – or is laid off!).
Suggested Read: Recover MySQL or MariaDB Root Password in Linux
This article will come in handy. We will explain how to change a root password of MySQL or MariaDB database server in Linux.
Although we will use a MariaDB server in this article, the instructions should work for MySQL as well.
Change MySQL or MariaDB Root Password
You know the root password and want to reset it, in this case, let’s make sure MariaDB is running:
------------- CentOS/RHEL 7 and Fedora 22+ -------------
# systemctl is-active mariadb
------------- CentOS/RHEL 6 and Fedora -------------
# /etc/init.d/mysqld status
Check MySQL Status
If the above command does not return the word active as output or its stopped, you will need to start the database service before proceeding:
------------- CentOS/RHEL 7 and Fedora 22+ -------------
# systemctl start mariadb
------------- CentOS/RHEL 6 and Fedora -------------
# /etc/init.d/mysqld start
Next, we will login to the database server as root:
# mysql -u root -p
For compatibility across versions, we will use the following statement to update the user table in the mysql database. Note that you need to replace YourPasswordHere with the new password you have chosen for root.
MariaDB [(none)]> USE mysql;
MariaDB [(none)]> UPDATE user SET password=PASSWORD('YourPasswordHere') WHERE User='root' AND Host = 'localhost';
MariaDB [(none)]> FLUSH PRIVILEGES;
To validate, exit your current MariaDB session by typing.
MariaDB [(none)]> exit;
and then press Enter. You should now be able to connect to the server using the new password.
Change MySQL/MariaDB Root Password
Summary
In this article we have explained how to change the MariaDB / MySQL root password – whether you know the current one or not.
As always, feel free to drop us a note if you have any questions or feedback using our comment form below. We look forward to hearing from you!
作者简介：
Gabriel Cánepa is a GNU/Linux sysadmin and web developer from Villa Mercedes, San Luis, Argentina. He works for a worldwide leading consumer product company and takes great pleasure in using FOSS tools to increase productivity in all areas of his daily work.
via: http://www.tecmint.com/change-mysql-mariadb-root-password/
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