Enable / disable Apache 2 modules

How to enable Apache 2 modules

To enable the modules you need to enter the a2enmod command, followed by the name of requested module:

#a2enmod module_name

If you don't remember the name of the module you have to enabled, you should simply not enter any parameters after a2enmod command:

#a2enmod

In this case, you receive a list which show disabled modules, as following example:

Which module would you like to enable?
Your choices are: actions alias asis auth_basic auth_digest authn_alias authn_anon authn_dbd 
authn_dbm authn_default authn_file authnz_ldap authz_dbm 
authz_default authz_groupfile authz_host authz_owner authz_user 
autoindex cache cern_meta cgid cgi charset_lite dav_fs dav 
dav_lock dav_svn dbd deflate dir disk_cache env expires userdir usertrack version vhost_alias
Module name?

After module activation, it's necessary to apply the changes made, by running a restart of the server, usually via the command:

#/etc/init.d/apache2 force-reload

Example
To install the mod_rewrite you have to type following commands:

#a2enmod rewrite
#/etc/init.d/apache2 force-reload

How to disable Apache 2 modules

The process of deactivation of the module, with relative cancellation of his symbolic link in the directory /etc/apache2/mods-enabled/, is quite similar to that previously shown for activation. The command used this time is a2dismod, which can be followed by module name or used without parameters for a list of options.
In first case, the code will be as follows:

#a2dismod module_name

In second case, simply type

#a2dismod

to receive the list of enabled modules, for example:

Which module would you like to disable?
Your choices are: alias auth_basic authn_file authz_default authz_groupfile authz_host authz_user 
autoindex cgi dav dav_svn dir env mime negotiation php5 rewrite 
setenvif ssl status userdir
Module name?