Steps

1. sudo mkdir -p /var/www/rex.com/
2. sudo chown -R ubuntu:www-data /var/www/rex.com/
3. sudo chmod -R 755 /var/www/
4. cd /etc/apache2/sites-available/
   sudo cp 000-default.conf rex.com.conf
   sudo nano rex.com.conf
5. sudo a2ensite rex.com.conf
6. sudo service apache2 restart

Reference:

1. http://diary.taskinghouse.com/posts/664386
2. https://nouveauframework.org/blog/vhosts-running-multiple-sites-on-a-single-aws-ec2-instance/

Install mbstring:

Enable mbstring module

Restart apache:

Reference:

• http://www.knowledgebase-script.com/kb/article/how-to-enable-mbstring-in-php-46.html
• http://stackoverflow.com/questions/33649602/amazon-linux-php-mbstring
• http://stackoverflow.com/questions/31190547/dependency-issue-trying-to-install-php-mbstring-on-ec2

Find the path of httpd.conf

ps -ef | grep apache
/usr/sbin/apache2 -V
Reference: http://www.commanigy.com/blog/2011/06/08/finding-apache-configuration-file-httpd-conf-location

Edit httpd.conf

sudo nano /etc/httpd/conf/httpd.conf
Reference:

• http://linux.vbird.org/linux_basic/0220filemanager.php
• http://linux.vbird.org/linux_basic/0160startlinux.php#nano
• http://stackoverflow.com/questions/15112424/how-to-edit-httpd-conf-file-in-amazon-ec2
• http://jafty.com/blog/enable-mod_rewrite-on-apache-ec2-linux-server/

Restart Apache

sudo service httpd restart

The solution was to run

setsebool -P httpd_can_network_connect=1