LAMP Server on CentOS 6

Updated by Elle Krout

A LAMP (Linux, Apache, MySQL, PHP) stack is a common web stack used to prepare servers for hosting web content. This guide provides step-by-step instructions for installing a full-featured LAMP stack on a CentOS 6 system.

This guide is written for a non-root user. Commands that require elevated privileges are prefixed with sudo. If you’re not familiar with the sudo command, you can check our Users and Groups guide.

Before You Begin

  1. Ensure that you have followed the Getting Started and Securing Your Server guides, and the Linode’s hostname is set.

    To check your hostname run:

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    hostname
    hostname -f
    

    The first command should show your short hostname, and the second should show your fully qualified domain name (FQDN).

  2. Update your system:

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    sudo yum update
    

Install and Configure the Apache Web Server

  1. Install Apache 2.2:

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    sudo yum install httpd
    
  2. Edit the httpd.conf under /etc/httpd/conf/ to adjust the resource use settings. The settings shown below are a good starting point for a Linode 1GB:

    Before changing any configuration files, it is advised that you make a backup of the file. To make a backup:

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    cp /etc/httpd/conf/httpd.conf ~/httpd.conf.backup
    
    /etc/httpd/conf/httpd.conf
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    KeepAlive Off
    
    ...
    
    <IfModule prefork.c>
        StartServers        2
        MinSpareServers     6
        MaxSpareServers     12
        MaxClients          80
        MaxRequestsPerChild 3000
    </IfModule>
    

Configure Apache Virtual Hosts

There are different ways to set up virtual hosts; however, the method below is recommended. By default, Apache listens on all IP addresses available to it.

  1. Create a file under /etc/httpd/conf.d called vhost.conf. Replace instances of example.com with your own domain information:

    /etc/httpd/conf.d/vhost.conf
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    NameVirtualHost *:80
    
    <VirtualHost *:80> 
         ServerAdmin webmaster@example.com
         ServerName example.com
         ServerAlias www.example.com
         DocumentRoot /var/www/example.com/public_html/
         ErrorLog /var/www/example.com/logs/error.log 
         CustomLog /var/www/example.com/logs/access.log combined
    </VirtualHost>
    

    Additional code blocks can be added to the file for any other domains you with to host on the Linode.

    ErrorLog and CustomLog entries are suggested for more fine-grained logging, but are not required. If they are defined (as shown above), the logs directories must be created before you restart Apache.

  2. Create the directories referenced above:

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    sudo mkdir -p /var/www/example.com/public_html
    sudo mkdir /var/www/example.com/logs
    
  3. Start Apache for the first time, and set it to run at boot:

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    sudo service httpd start
    sudo /sbin/chkconfig --levels 235 httpd on 
    

    You should new be able to view a default Apache page on your website.

    Anytime you change an option in your vhost.conf file, or any other Apache configuration file, remember to reload the configuration with the following command:

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    sudo service httpd reload 
    

Install and Configure MySQL

  1. Install the MySQL package:

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    sudo yum install mysql-server
    
  2. Start MySQL, and set it to run at boot:

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    sudo service mysqld start
    sudo /sbin/chkconfig --levels 235 mysqld on 
    
  3. Run musql_secure_installation to secure MySQL. You will be given the option to change the root password, remove anonymous user accounts, disable root logins outside of localhost, and remove test databases and reload privileges. It is recommended that you answer yes to these options:

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    mysql_secure_installation
    

Create a MySQL Database

  1. Log in to MySQL:

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    mysql -u root -p
    

    Enter MySQL’s root password. You will then be presented with a MySQL prompt.

  2. Create a database and user:

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    create database webdata;
    grant all on webdata.* to 'webuser' identified by 'password';
    

    In the above example webdata is the name of the database, webuser the user, and password a strong password.

  3. Exit MySQL:

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    quit
    

With Apache and MySQL installed you are ready to move on to installing PHP.

Install and Configure PHP

  1. Install PHP:

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    sudo yum install php php-pear
    

    If you wish to install MySQL support for PHP also install the php-mysql package:

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    sudo yum install php-mysql
    
  2. Edit /etc/php.ini for better error messages and logs, and upgraded performance. These modifications provide a good starting point for a Linode 1GB:

    /etc/php.ini
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    error_reporting = E_COMPILE_ERROR|E_RECOVERABLE_ERROR|E_ERROR|E_CORE_ERROR
    error_log = /var/log/php/error.log
    max_input_time = 30
    

    Ensure that all the lines noted above are uncommented. A commented line begins with a semicolon (;).

  3. Create the log directory for PHP and give the Apache user ownership:

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    sudo mkdir /var/log/php
    sudo chown apache /var/log/php
    
  4. Restart Apache:

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    sudo service httpd restart
    

More Information

You may wish to consult the following resources for additional information on this topic. While these are provided in the hope that they will be useful, please note that we cannot vouch for the accuracy or timeliness of externally hosted materials.

This guide is published under a CC BY-ND 3.0 license.