Installing Apache2 , Mysql server and PHP on Centos 6 (LAMP)

How to install Apache , mysql and PHP on centos 6 .

In this tutorial we can see the step by step installation of Apache webserver along with mysql and php enabled. This tutorial is very basic , Strictly for beginners or internal purpose .

after installing (Centos 6 installation step by step screenshots ) and configuring network (How to setup network in centos 6)

Update yum repositories and packages by typing the below command

[root@localhost ~]# yum update
After updating repositories , we can start installing packages one by one.
1. Apache2 installation and configuration
2. Mysql installation 
3. PHP installation 
4. Testing all together

Apache2 installation :

Apache2 package installation and configuration is very simple .

Step 1 » just type the command

[root@localhost ~]# yum install httpd

This command will install httpd package along with dependencies

After installing the package .

Step 2 » Open the file /etc/httpd/conf/httpd.conf .
Find “#ServerName www.example.com:80″ (line no : 276 ) .
#
#ServerName www.example.com:80
and add this line below  .  “ServerName youripaddress:80″

#
#ServerName www.example.com:80
ServerName 192.168.141.22:80

Step 3 » Now start apache service

[root@localhost ~]# service httpd start

and type this below command to start apache service automatically while booting.

[root@localhost ~]# chkconfig --levels 235 httpd on

Step 4 » Now you have successfully configured apache web server . open your browser and type the ip address in the address bar and hit enter . you can see the test page of your web server .

Testing your page:

Goto the default apache root path /var/www/html . create a new file index.html  and paste the below code and save it.

Welcome to my webserver

Again open the webserver ip address in the browser . you can see the index page created by you.

Mysql installation :

Step 1 » just type the command to install mysql server and client packages along with dependencies .

[root@localhost ~]# yum install mysql-server

After installation packages and  dependencies .

Step 2 » Start mysql service

[root@localhost ~]# service mysqld start

and type this below command to start mysql server automatically while booting.

[root@localhost ~]# chkconfig --levels 235 mysqld on

Step 3 » Create a new root password for mysqlserver

[root@localhost ~]# mysqladmin -u root password '********'

Step 4 » Test your mysql server by login as root

[root@localhost ~]# mysql -u root -p ( press enter )
Enter password:(Type your mysql root password and press enter)
Now you can see the mysql prompt.
[root@localhost ~]# mysql -u root -p
Enter password:
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 3
Server version: 5.1.61 Source distribution
Copyright (c) 2000, 2011, 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.
mysql>

PHP installation :

Step 1 » Install php package along with php-mysql .
[root@localhost ~]# yum install php php-mysql
After installing php , create a php info file to test your php configuration .

Step 2 » Goto the default apache root path /var/www/html . create a new filephpinfo.php  and paste the below code and save it.

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<?php phpinfo(); ?>

Step 3 » Restart apache service

[root@localhost ~]# service httpd restart

Step 4 » open the filepath in the browser ( http://192.168.141.22/phpinfo.php ). you can see the php information page as below.

and make sure you can see the mysql details in the php information page .

Finally apache2 , php and mysql has been configured perfectly . few more steps need to be performed to check the database connectivity.

Testing All together :

We need to test mysql database connectivity in php .

Step 1 » create a new file dbtest.php in the apache root path (/var/www/html) and paste the below code .Replace “password” with your mysql root password.

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<?php $con = mysql_connect("localhost","root","password"); if (!$con) { die('Could not connect: ' . mysql_error()); } else { echo "Congrats! connection established successfully"; } mysql_close($con); ?>

Step 2 » open the filepath in the browser ( http://192.168.141.22/dbtest.php ). you can see the page as below.

Congrats , you just made it

If you are getting some errors like

» Could not connect: Can’t connect to local MySQL server through socket ‘/var/lib/mysql/mysql.sock’ (2)

( This means your mysql server service is stopped , you must start the service  “service mysql start”)

» Could not connect: Access denied for user ‘root’@'localhost’ (using password: YES)

(Something wrong with username and password )

if you are getting a blank page , then must be a problem with the code .