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Apache HTTP Server

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Install Apache​

RHEL/Centos:

sudo yum install httpd

Ubuntu/Debian:

sudo apt install apache2

Configuration/folder structure​

RHEL/Centos:

  • Main configuration folder: /etc/httpd/

  • Main configuration file: /etc/httpd/conf/httpd.conf

  • Folder for module configuration files: /etc/httpd/conf.d/

    (all *.conf files in this folder will be loaded)

Ubuntu/Debian:

  • Main configuration folder: /etc/apache2/

  • Main configuration file: /etc/apache2/apache2.conf

  • Configuration file for listening ports: /etc/apache2/ports.conf

  • Folder for module configuration files: /etc/apache2/mods-enabled/

    (all _.conf and _.load files in this folder will be loaded)

  • Folder for sites/virtual hosts configuration files : /etc/apache2/sites-enabled/

    (all *.conf files in this folder will be loaded)

  • Folder for global configuration fragments : /etc/apache2/conf-enabled/

    (all *.conf files in this folder will be loaded)

Enable a module:​

RHEL/Centos:

  1. Search for the module to install (most modules begin with mod_):

    sudo yum search mod_ssl

    Or search all available modules:

    sudo yum search mod_

  2. Install the module

    sudo yum install mod_ssl

    This will automatically create a file in /etc/httpd/conf.d/ that will load the module so it can be used.

Ubuntu/Debian:

  1. Search for the module to install (most modules begin with libapache2-mod-):

    apt-cache search libapache2-mod-php5

    Or search all available modules:

    apt-cache search libapache2-mod

  2. Install the module

    sudo apt install libapache2-mod-php5

  3. Enable the module

    sudo a2enmod php5

In Ubuntu/Debian, SSL is installed by default, it just needs to be enabled:

sudo a2enmod ssl

Enable a site (Ubuntu/Debian):​

  1. Back up the original configuration

    sudo cp /etc/apache2/sites-available/default-ssl /etc/apache2/sites-available/default-ssl.bak

  2. Modify it as needed

    sudo vim /etc/apache2/sites-available/default-ssl

  3. Enable the site

    sudo a2ensite default-ssl