CentOS 6
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Install MySQL 5.1
2014/08/23
 
Install MySQL 5.1 which is CentOS 6 default version to configure database server.
[1] Install MySQL 5.1 Server.
[root@www ~]#
yum -y install mysql-server
[root@www ~]#
vi /etc/my.cnf 
[mysqld]
datadir=/var/lib/mysql
socket=/var/lib/mysql/mysql.sock
user=mysql
# Disabling symbolic-links is recommended to prevent assorted security risks
symbolic-links=0
# add

character-set-server=utf8
[root@www ~]#
/etc/rc.d/init.d/mysqld start 

Initializing MySQL database:  WARNING: The host 'www.srv.world' could not be looked up with resolveip.
This probably means that your libc libraries are not 100 % compatible
with this binary MySQL version. The MySQL daemon, mysqld, should work
normally with the exception that host name resolving will not work.
This means that you should use IP addresses instead of hostnames
when specifying MySQL privileges !
Installing MySQL system tables...
OK
Filling help tables...
OK
...
...
...
You can test the MySQL daemon with mysql-test-run.pl
cd /usr/mysql-test ; perl mysql-test-run.pl

Please report any problems with the /usr/bin/mysqlbug script!

                                              [  OK  ]
Starting mysqld:                      [  OK  ]
[root@www ~]#
chkconfig mysqld on

[2] Initial settings for MySQL.
[root@www ~]#
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

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.
# set root password

Set root password? [Y/n]
y

New password:    
# input any 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

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

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

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

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!
# try to connect with root

[root@www ~]#
mysql -u root -p

Enter password:    
# MySQL root password

Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 11
Server version: 5.1.73 Source distribution

Copyright (c) 2000, 2013, Oracle and/or its affiliates. All rights reserved.

Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
# display user list

mysql>
select user,host,password from mysql.user; 

+------+-----------+-------------------------------------------+
| user | host      | password                                  |
+------+-----------+-------------------------------------------+
| root | localhost | ***************************************** |
| root | 127.0.0.1 | ***************************************** |
+------+-----------+-------------------------------------------+
2 rows in set (0.00 sec)
# display database list

mysql>
show databases; 

+--------------------+
| Database           |
+--------------------+
| information_schema |
| mysql              |
+--------------------+
2 rows in set (0.00 sec)
mysql>
exit

Bye
[3] If IPTables is running and also MySQL is used from remote Hosts, allow port like follows. MySQL uses 3306/TCP.
[root@www ~]#
iptables -I INPUT 5 -p tcp -m state --state NEW -m tcp --dport 3306 -j ACCEPT
 
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