Prerequisite:

Whilst using MYSQL SERVER 5.7 or above kindly ensure to comment the line

#thread_concurrency = 8

 in the file (“/etc/my.cnf “  or “/etc/mysqld/my.cnf “ ) as its deprecated from version 5.7.

Installation Commands:

yum remove mysql57-community-release.noarch
yum clean all
yum install https://dev.mysql.com/get/mysql57-community-release-el6-11.noarch.rpm
yum install mysql-community-server

Now Start the Server using the following commands:

/etc/init.d/mysql start ## use restart after update

## OR ##

service mysql start ## use restart after update

chkconfig –levels 235 mysqld on

service mysql status

Note: IF service doesn’t start check logs for error using command ‘cat /var/logs/mysqld.log’, if table is damaged kindly run commands to fix

            /etc/init.d/mysqld start –skip-grant-tables && mysql_upgrade

            ## OR ##

            service mysqld start –skip-grant-tables && mysql_upgrade

        /etc/init.d/mysqld status

          ## OR ##

         service mysql status

If the UserName & Password for the server already exists then use command,

            mysql -u root -p

and enter the password to login.

If it’s a first time installation then use the following command to generate “temporary password” to login,

            sudo grep “temporary password” /var/log/mysqld.log

Example Output:

[Note] A temporary password is generated for root@localhost: -et)QoL4MLid

 

Next Follow the steps below to set up the server database (Optional):

 MySQL Secure Installation

  • Change root password
  • Remove anonymous users
  • Disallow root login remotely
  • Remove test database and access to it
  • Reload privilege tables

Start MySQL Secure Installation with following command

/usr/bin/mysql_secure_installation

Output:

Securing the MySQL server deployment.

Enter password for user root:

The existing password for the user account root has expired. Please set a new password.

New password:

Re-enter new password:

VALIDATE PASSWORD PLUGIN can be used to test passwords

and improve security. It checks the strength of password

and allows the users to set only those passwords which are

secure enough. Would you like to setup VALIDATE PASSWORD plugin?

Press y|Y for Yes, any other key for No: y

There are three levels of password validation policy:

LOW    Length >= 8

MEDIUM Length >= 8, numeric, mixed case, and special characters

STRONG Length >= 8, numeric, mixed case, special characters and dictionary                  file

Please enter 0 = LOW, 1 = MEDIUM and 2 = STRONG: 0

Using existing password for root.

Estimated strength of the password: 100

Change the password for root ? ((Press y|Y for Yes, any other key for No) : y

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) : y

Success.

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!

Note: If you don’t want some reason, do a “MySQL Secure Installation” then at least it’s very important to change the root user’s password

mysqladmin -u root password [your_password_here]

## Example ##

mysqladmin -u root password myownsecrectpass

  1. Connect to MySQL database (localhost) with password

mysql -u root -p

## OR ##

mysql -h localhost -u root -p

  1. Create Database, Create MySQL User and Enable Remote Connections to MySQL Database

This example uses following parameters:

  • DB_NAME = webdb
  • USER_NAME = webdb_user
  • REMOTE_IP = 10.0.15.25
  • PASSWORD = password123
  • PERMISSIONS = ALL

## CREATE DATABASE ##

mysql> CREATE DATABASE webdb;

## CREATE USER ##

mysql> CREATE USER ‘webdb_user’@’10.0.15.25’ IDENTIFIED BY ‘password123’;

## GRANT PERMISSIONS ##

mysql> GRANT ALL ON webdb.* TO ‘webdb_user’@’10.0.15.25’;

##  FLUSH PRIVILEGES, Tell the server to reload the grant tables  ##

mysql> FLUSH PRIVILEGES;

GRANT ALL PRIVILEGES ON *.* TO ‘root’@’%’ IDENTIFIED BY ‘Root@123’ WITH GRANT OPTION;