What is LAMP?

LAMP is a common web stack which stands for Linux, Apache, MySQL and PHP. It is used to prepare servers in order to host web content.

1. To check your short hostname use the following command:

hostname

2. To check your FQDN (fully qualified domain name) use the following command:

hostname -f

3. To update your system use the following command:

sudo yum update

Apache Web

Installation and configuration

1.       To Install Apache 2 run :

sudo yum install httpd

2.       In order to adjust the resource use settings edit the httpd.conf under /etc/httpd/conf/

Before changing  any configuration files be sure to make a backup by running the following command :

cp /etc/httpd/conf/httpd.conf ~/httpd.conf.backup

Note : The following configurations are for a 2GB instance.

File : /etc/httpd/conf/httpd.conf

KeepAlive Off

...

<IfModule prefork.c>

    StartServers    4

    MinSpareServers 20

    MaxSpareServers 40

    MaxClients      200

    MaxRequestsPerChild 4500

</IfModule>

Configuration of Apache Virtual Hosts

1.    Create a file called vhost.conf under /etc/httpd/conf.d

Replace instances of example.com with your own domain information:

File : /etc/httpd/conf.d/vhost.conf

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>

Note : ErrorLog and CusomLog are not required they are added for more detailed logging.  If you decide to define them as in the code above , the log directories must be created  before you restart Apache.

2.       Create the following directories.

sudo mkdir -p /var/www/example.com/public_html

sudo mkdir /var/www/example.com/logs

3.       Start Apache, and set it to run at boot using the following command:

sudo service httpd start

sudo /sbin/chkconfig --levels 235 httpd on

Now you can view a default Apache page on your website.

Note : Anytime you change an element in the vhost.conf file or any other Apache configuration file always reload the configuration using the following command :

sudo service httpd reload

MySQL

Installation and configuration

1.       To Install MySQL package run :

sudo yum install mysql-server

2. Start MySQL and set it to run at boot:

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

3. In order to securely install MySQL run :

mysql_secure_installation

Create a MySQL Database

1. Login to MySQL :

mysql -u root -p

2. Create a database and user :

create database tableName;
grant all on tableName.* to 'username' identified by 'password';

3. Exit mySQL:

quit

PHP

Installation and configuration

1.       To Install PHP run :

sudo yum install php php-pear

Note : To install MySQL support for PHP install the following package :

sudo yum install php-mysql

2. In order to get better  error messages and logs, and upgraded performance  edit /etc/php.ini

File : /etc/php.ini

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

Note : All the lines above should be uncommented. (the ; should be removed ) :

3. Create the PHP log directory:

sudo mkdir /var/log/php

4. Give ownership to the Apache user :

sudo chown apache /var/log/php

5. Restart Apache :

sudo service httpd restart