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    Knowledge Base

    How to install LAMP on CentOS 6

    Introduction

    LAMP is an acronym for Linux, Apache, MySQL, and PHP. All of these components together allow obtaining a full web-server. Each of them is responsible for a certain component of web-hosting.

    Preparation

    All server settings are to be carried out with root privileges. To do this, run the command:

    sudo su -

    In the beginning, create a user under which we will work with site files. To do this, run the command:

    useradd -m username

    This command will also create a home directory in /home/username. Website catalogues of the server will be stored inside the user's home directory.

    For your convenience, the root directory of each site will be called by its name. Create a root directory for our future site. After that, make our user the owner of the directory.

    mkdir /home/username/my-first-domain.com chown -R username:username /home/username/my-first-domain.com

    Installing Apache

    yum install httpd

    Next, we set up the automatic loading at startup for the Apache server using chkconfig:

    chkconfig httpd on

    run Apache:

    service httpd start Starting httpd: [OK]

    Configuring Apache

    Basic settings

    At this stage, it is necessary to make some changes in the Apache configuration files.

    To do this, you will need a text editor such as nano. To install it, run the command

    yum install nano

    Let's start with the main Apache configuration file:

    nano /etc/httpd/conf/httpd.conf

    Find the following construction and leave a comment:

    <Directory /> Options FollowSymLinks AllowOverride None Require all denied </Directory>

    Insert the following construction below:

    <Directory /home/username/> AllowOverride All </Directory>

    This will allow the server to work with the catalogue /home/username/ and support .htaccess.

    Adding a website

    The most popular method is creating a virtual host file in the conf.d/ directory. The advantage is that the catalogue already exists, and the file httpd.conf contains the following line:

    Include conf.d/*.conf

    These instructions include all files with the ".conf" extension in the conf.d / directory. It means that any files in this directory that have the ".conf" extension will be treated as Apache configuration files. The files are processed in alphabetical order.

    Run the command:

    nano /etc/httpd/conf.d/my-first-domain.com.conf

    Example of a filled virtual host file my-first-domain.com.conf:

    <VirtualHost Server-IP:80> ServerName my-first-domain.com ServerAlias www.my-first-domain.com ServerAdmin mail@my-first-domain.com DocumentRoot /home/username/my-first-domain.com </VirtualHost>

    - Server-IP – is the IP address of your server.

    - ServerName - the name of the virtual host must be set to the fully qualified domain name (FQDN), in our case my-first-domain.com determines which domain name serves this virtual host.

    - ServerAdmin - contact e-mail address of the domain administrator is included in the reports on the web server errors. It is recommended to have a separate mailbox for this purpose.

    - ServerAlias - alias hostname, the value www.my-first-domain.com is obligatory, so that your site would work with both www, and without.

    - DocumentRoot - the root folder of the virtual host. Specify the directory of the site placement / home / username / my-first-domain.com

    After connecting a website, make sure that no mistakes have been made, and configuration files do not contain errors:

    service httpd configtest Syntax OK

    After that, restart Apache to apply changes:

    service httpd restart

    Checking performance 

    Put a PHP script in the root directory:

    <?php echo "It works !" ; ?>

    Set the correct script rights with help of chmod chown

    Open your website in a browser. If your domain is not directed to the IP address of the server, you can always add a line:

    Server-IP my-first-domain.com

    - Server-IP is the IP address of your server.

    To the file hosts on your computer that you use for settings. In Windows, it is usually located in C:\Windows\System32\drivers\etc\, and in nix systems it’s located in /etc/

    MySQL Installation

    When installing the MySQL database server, according to the specified dependencies perl-DBI, perl-DBD-MySQL, mysql, and mysql-server will be installed as well.

    Installation:

    yum install mysql-server

    Set MySQL to run automatically when the system launches:

    chkconfig mysqld on

    Run MySQL:

    service mysqld start

    Setting up MySQL

    By default, after installation, we can connect to our database server under the root without entering the password. Therefore, we assign a password and make a few more settings by running the script:

    /usr/bin/mysql_secure_installation

    This script (if you answer yes to all the questions) will set a new root password, remove anonymous users, prohibit connection from remote machines as root, and remove the test database. Please note that the root MySQL password should be stored in a safe place.

    You can connect using a MySQL client:

    mysql -u root -p

    PHP Installation

    yum install php

    Installing a MySQL module for PHP:

    yum install php-mysql

    Basic installation includes a set of standard PHP modules. To see the list of available modules, run the command:

    php -m

    Installing extra modules (if you need them):

    yum install php-common php-mbstring php-mcrypt php-devel php-xml php-gd

    Adding a remi repository 

    If the repositories that are specified in the system are missing some packages, add a remi repository:

    wget http://rpms.famillecollet.com/enterprise/remi-release-6.rpm sudo rpm -Uvh remi-release-6*.rpm

    Remi repository will be turned off by default, but the packages can be installed using '--enablerepo=remi' for example:

    sudo yum --enablerepo=remi install php-xml

    It can also be activated in the file /etc/yum.repos.d/remi.repo

    sudo nano /etc/yum.repos.d/remi.repo

    Change enabled=0 to enabled=1

    name=Les RPM de remi pour Enterprise Linux $releasever - $basearch #baseurl=http://rpms.famillecollet.com/enterprise/$releasever/remi/$basearch/ mirrorlist=http://rpms.famillecollet.com/enterprise/$releasever/remi/mirror enabled=1 gpgcheck=1 gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-remi failovermethod=priority