How to Install MySQL Server on CentOS / Redhat 6/7/8

In this article I will explain how to Install MySQL Server on CentOS/ Redhat. MySQL server is the most popular open source relational database management system (RDBMS). MySQL has become the leading database choice web-based applications, Used by high profile web properties including Facebook, Youtube, Twitter, Yahoo! and many more.

You may also like this:   http://www.looklinux.com/mysql-database-backup-automatic-script/

• How to setup MySQL database backup using shell scripts?
• How to setup and configure Mysql Master Slave replication?

In this article I will show how to install MySQL on CentOS 7 and RHEL 7.

Install MySQL Sever on CentOS / Redhat

Follow these below steps to install MySQL server on CentOS and Redhat.

1. If MariaDB server is already installed on your server, first remove it to avoid conflict.

# yum remove mariadb-server -y

2. Now download the MySQL 5.7 repository.

# wget https://dev.mysql.com/get/mysql57-community-release-el7-8.noarch.rpm

3. Install MySQL 5.7 repository on you server.

# rpm -ivh mysql57-community-release-el7-8.noarch.rpm

4. Install MySQL 5.7 database server.

# yum install mysql-server -y

5. Start MySQL server.

# systemctl start mysqld

6. Enable auto start at boot.

# systemctl enable mysqld

7. At the initial start up of the MySQL database server, the following happens, given that the data directory of the server is empty.

a) The server is initialized.
b) An SSL certificate and key files are generated in the data directory.
c) The validate_password plugin is installed and enabled.
d) A superuser account ‘root’@’localhost is created. The initial root password created can be found in the error log file. You can get the password by issue the following command.

# grep 'temporary password' /var/log/mysqld.log
2017-06-19T23:08:09.439963Z 1 [Note] A temporary password is generated for root@localhost: sj-mMM;o%6Ll

8. Secure MySQL server.

Run the mysql_secure_installation script to address several security concerns in a default MySQL installation.

You will be given the choice to change the MySQL root password, remove anonymous user accounts, disable root logins outside of localhost, and remove test databases. It is recommended that you answer yes to these options.

# mysql_secure_installation

Securing the MySQL server deployment.

Enter password for user root:
The 'validate_password' plugin is installed on the server.
The subsequent steps will run with the existing configuration
of the plugin.
Using existing password for root.

Estimated strength of the password: 50
Change the password for root ? ((Press y|Y for Yes, any other key for No) : yes

New password:

Re-enter new password:

Estimated strength of the password: 50
Do you wish to continue with the password provided?(Press y|Y for Yes, any other key for No) : y
By default, a MySQL installation has an anonymous user,
allowing anyone to log into MySQL 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? (Press y|Y for Yes, any other key for No) : 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? (Press y|Y for Yes, any other key for No) : no

 ... skipping.
By default, MySQL 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? (Press y|Y for Yes, any other key for No) : 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? (Press y|Y for Yes, any other key for No) : y
Success.

All done!