How to install Wordpress 4.0 on CentOS 7.0

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This document describes how to install and configure Wordpress 4.0 on CentOS 7.0. WordPress started in 2003 with a single bit of code to enhance the typography of everyday writing and with fewer users than you can count on your fingers and toes. Since then it has grown to be the largest self-hosted blogging tool in the world, used on millions of sites and seen by tens of millions of people every day. This tutorial explains the process of installing Wordpress 4.0 on CentOS 7.0 in the form of a simple-to-follow guide.

1 Preliminary Note

This tutorial is based on CentOS 7.0 server, so you should set up a basic CentOS 7.0 server installation before you continue with this tutorial. The system should have a static IP address. I use 192.168.0.100 as my IP address in this tutorial and server1.example.com as the hostname. You must have a LAMP server installed in CentOS 7.0 as mentioned in the tutorial to continue further.

2 Database initialization

I will create the database for the Wordpress 4.0 as follows:

mysql -u root -p

Here we are adding database=wordpressdb user=wordpressuser and password=wordpresspassword:

CREATE DATABASE wordpressdb;

CREATE USER wordpressuser@localhost IDENTIFIED BY 'wordpresspassword';

GRANT ALL PRIVILEGES ON wordpressdb.* TO wordpressuser@localhost;

Further moving ahead:

FLUSH PRIVILEGES;
exit

Restart services

service httpd restart
service mariadb restart

Further you need to allow the Firewall-cmd to http and https as follows:

firewall-cmd --permanent --zone=public --add-service=http
firewall-cmd --permanent --zone=public --add-service=https
firewall-cmd --reload

3 Installation of Wordpress 4.0

We will first make a directory temp in which I will the download the latest version of the Wordpress as follows:

mkdir temp
cd temp
yum install wget unzip net-tools

wget http://wordpress.org/latest.zip

Further moving ahead if you wish to work with images, install
plugins and site updation with SSH credentials then we will install:

yum install php-gd
service httpd restart

unzip the Wordpress 4.0 zip file in the folder:

unzip -q latest.zip -d /var/www/html/

Now give appropriate permissions in the directory

chown -R apache:apache /var/www/html/wordpress
chmod -R 755 /var/www/html/wordpress

Further we need to manually create the uploads directory beneath the
wp-content directory at our document root. This will be the parent
directory of our content:

mkdir -p /var/www/html/wordpress/wp-content/uploads

We need to allow the web server itself to write to this directory. We
can do this by assigning group ownership of this directory to our web
server. This will allow the web server to create files and directories
under this directory, which will permit us to upload content to the
server. Proceed like this:

chown -R :apache /var/www/html/wordpress/wp-content/uploads

Now
we need the sample configuration file,to copy it to the default
configuration file to get WordPress to recognize the file. The sample
configuration file is available at /var/www/html/wordpress:

cd /var/www/html/wordpress/

cp wp-config-sample.php wp-config.php

vi wp-config.php

[...]

// ** MySQL settings - You can get this info from your web host ** //

/** The name of the database for WordPress */

define('DB_NAME', 'wordpressdb');

/** MySQL database username */

define('DB_USER', 'wordpressuser');

/** MySQL database password */

define('DB_PASSWORD', 'wordpresspassword');

[...]

Change values as you gave at the time of database initialization.

Now proceed to the web installation of Wordpress 4.0. Go to the URL http://192.168.0.100/wordpress/wp-admin/install.php:

Select language and press Continue:

Now give the values as I gave in my case

Site Title = Wordpress-testsite

Admin Email = admin@example.com

Username = admin

Admin password = howtoforge

Confirm Admin Password = howtoforge

The above values will differ in you case, you can give any values of your choice. After giving the values press InstallWordpress:

Now we will proceed towards the login page by pressing LogIn:

Give the credentials as you selected at the time of web wordpress installation:

This will be your default welcome window of Wordpress. We can check the Wordpress version in browser as:

6 Configure Pretty Permalinks for WordPress

This part is optional.

By default, WordPress creates URLs dynamically that look something like this http://server_domain_name_or_IP/?p=1. This isn't exactly the most useful interface for visitors or search engines, so most users want to modify this. WordPress has the ability to create "pretty" permalinks which will clean up the URL into a more human-friendly format. To overcome this thing we will proceed as follows:

6.1 Apache Rewrite

We will modify the apache virtual host file for Wordpress to get it allowed for .htaccess overrides. For this we will edit the virtual host file and add the entries as:

vi /etc/httpd/conf/httpd.conf

[...]
 # Further relax access to the default document root:

<Directory "/var/www/html">

    #

    # Possible values for the Options directive are "None", "All",

    # or any combination of:

    #   Indexes Includes FollowSymLinks SymLinksifOwnerMatch ExecCGI MultiViews

    #

    # Note that "MultiViews" must be named *explicitly* --- "Options All"

    # doesn't give it to you.

    #

    # The Options directive is both complicated and important.  Please see

    # http://httpd.apache.org/docs/2.4/mod/core.html#options

    # for more information.

    #

    Options Indexes FollowSymLinks

    #

    # AllowOverride controls what directives may be placed in .htaccess files.

    # It can be "All", "None", or any combination of the keywords:

    #   Options FileInfo AuthConfig Limit

    #

     AllowOverride All

[...]

Change the value from AllowOverride None to AllowOverride All, next restart the service:

service httpd restart

6.2 Create an .htaccess File

Now we will create .htaccess file in document root, it will allow Apache to rewrites:

touch /var/www/html/wordpress/.htaccess

We need the web server to be the group owner though, so we should adjust the ownership as follows:

chown apache /var/www/html/wordpress/.htaccess

If you want WordPress to automatically update this file with rewrite rules, you can ensure that it has the correct permissions to do so by using:

chmod 664 /var/www/html/wordpress/.htaccess

If you want to update this file manually for the sake of a small security gain, you can allow the web server only read privileges by typing:

chmod 644 /var/www/html/wordpress/.htaccess

In my case I am using permissions 644.

6.3 Permalink Settings in WordPress

Now we can easily adjust the permalink settings through the WordPress administration interface. Goto Settings-->Permalinks:

When you have made your selection, click "Save Changes" to generate the rewrite rules.

Case1: If you allowed the web server write access to your .htaccess file, you should see a message like this:

Case2: If you did not allow the web server write access to your .htaccess file, you will be provided with the rewrite rules you need to add to the file manually.

In that case you need to add the values in the .htaccess file manually, Wordpress will pop-up the Rewrite value in the same screen as shown below: