How to Enable and disable apache modules

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For  Debian / Ubuntu Linux you can enable or disable any apache module using a2enmod and a2dismod. You don’t need to edit the conf file for that unless you are having some problem with this method. The syntax of these commands is really simple. For centos and other redhat based distributions we don`t use a2enmod and a2dismod, but  another  methode is used to enable and disable modules in apache.

For  Debian / Ubuntu Linux

Ubuntu and debian comes with two scripts:
  1-a2enmod is a script that enables the specified module within the apache2 configuration. It does this by creating symlinks within /etc/apache2/mods-enabled.

2- a2dismod disables a module by removing those symlinks. It is not an error to enable a module which is already enabled, or to disable one which is already disabled.

To enable a module:

sudo a2enmod module_name

To disable a module:

sudo a2dismod module_name

For instance, to enable mod_expires, execute sudo a2enmod expires in the terminal. If you see the following output, you can be sure that it has been enabled.

pirat9@pirat9-pc:~$ sudo a2enmod expires
Enabling module expires.
Run '/etc/init.d/apache2 restart' to activate new configuration!

To disable mod_expires:

sudo a2dismod expires

Restart the server after enabling the module.

sudo /etc/init.d/apache2 restart

 # cd /etc/httpd/conf.d/
# mv mod_expire.bkp expire.conf
# /etc/init.d/httpd restart

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