mySQL is a Relational Database Management System (RDBMS) that runs as a server providing multi-user access to a number of databases. For more information on MySQL, you can visit their website at www.mysql.com
yum install mysql-server mysqlOr if you want a specific version
yum install mysql55-server mysql55
Red Hat 7 comes with a mysql fork called mariadb. You may want to remove this package.
yum remove mariadb
If you want more information about what you just installed
repoquery -i mysql-server
If you plan to use mySQL with php, you should also install the php-mysql package as well.
yum -y install php-mysql
Set the mySQL service to start on boot
chkconfig mysqld onor
systemctl enable mysqld.service
Start the mySQL service.
service mysqld start
The first time you start you will get the following messages. We will deal with some of these recommendations below.
Initializing MySQL database: Installing MySQL system tables... 150406 17:34:48 [Note] libgovernor.so not found OK Filling help tables... 150406 17:34:50 [Note] libgovernor.so not found OK To start mysqld at boot time you have to copy support-files/mysql.server to the right place for your system PLEASE REMEMBER TO SET A PASSWORD FOR THE MySQL root USER ! To do so, start the server, then issue the following commands: /usr/bin/mysqladmin -u root password 'new-password' /usr/bin/mysqladmin -u root -h localhost.localdomain password 'new-password' Alternatively you can run: /usr/bin/mysql_secure_installation which will also give you the option of removing the test databases and anonymous user created by default. This is strongly recommended for production servers. See the manual for more instructions. You can start the MySQL daemon with: cd /usr ; /usr/bin/mysqld_safe & You can test the MySQL daemon with mysql-test-run.pl cd /usr/mysql-test ; perl mysql-test-run.pl Please report any problems at http://bugs.mysql.com/
Next, login to mysql and do some cleanup
mysql -u root
Set the root user password for all local domains. Use your own "new-password"
SET PASSWORD FOR 'root'@'localhost' = PASSWORD('new-password');
SET PASSWORD FOR 'root'@'localhost.localdomain' = PASSWORD('new-password');
SET PASSWORD FOR 'root'@'127.0.0.1' = PASSWORD('new-password');
Drop the Any user
DROP USER ''@'localhost'; DROP USER ''@'localhost.localdomain'; exit
Additional security clean up can be performed by running the 'mysql_secure_installation' command
> /usr/bin/mysql_secure_installation
NOTE: RUNNING ALL PARTS OF THIS SCRIPT IS RECOMMENDED FOR ALL MySQL
SERVERS IN PRODUCTION USE! PLEASE READ EACH STEP CAREFULLY!
In order to log into MySQL to secure it, we'll need the current
password for the root user. If you've just installed MySQL, and
you haven't set the root password yet, the password will be blank,
so you should just press enter here.
Enter current password for root (enter for none):
OK, successfully used password, moving on...
Setting the root password ensures that nobody can log into the MySQL
root user without the proper authorisation.
You already have a root password set, so you can safely answer 'n'.
Change the root password? [Y/n] y
New password:
Re-enter new password:
Password updated successfully!
Reloading privilege tables..
... Success!
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? [Y/n] 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? [Y/n] 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? [Y/n] 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? [Y/n] y
... Success!
Cleaning up...
All done! If you've completed all of the above steps, your MySQL
installation should now be secure.
Thanks for using MySQL!
Next time you login, you must specify both username and password:
mysql -u root -p
Show databases.
mysql> show databases;
SHOW DATABASES
SHOW TABLES
SHOW FIELDS FROM table / SHOW COLUMNS FROM table / DESCRIBE table / DESC table / EXPLAIN table
SHOW CREATE TABLE table
DESCRIBE db;
// create, use and delete database
CREATE DATABASE mabase CHARACTER SET utf8
USE mabase
DROP DATABASE mabase
//create user
CREATE USER 'user'@'localhost' IDENTIFIED BY 'password';
//example:
CREATE USER 'test123'@'localhost' IDENTIFIED BY 'pw';
DROP USER 'test123'@'localhost' IDENTIFIED BY 'pw';
// show list of usesr with host
select User,Host from mysql.user;
// show unqiue users
select distinct User from mysql.user;
// grant priviledges on database
GRANT ALL PRIVILEGES ON base.* TO 'user'@'localhost' IDENTIFIED BY 'password';
eg: USE magento18;
GRANT ALL PRIVILEGES ON magento18.* TO 'test123'@'localhost' IDENTIFIED BY 'pw';
// reload priviledges
flush privileges;
// revoke all priviledges on database
eg: USE magento18;
REVOKE ALL PRIVILEGES on magento18.* FROM 'test123'@'localhost';
flush privileges;
You can check the user table in mysql database to verify that all users have passwords using this command:
use mysql; select Host,User,Password from user;