1. Install Apache 2.4 from source:

1.1 Prerequisites:

For installing Apache2.4 on Debian you need APR library. You can install this using the following command:

apt-get install libaprutil1 libaprutil1-dev

1.2  Download Apache2.4:

Download the latest version from here: http://httpd.apache.org/download.cgi#apache24
Go to /usr/src directory and download the latest version.

cd /usr/src
wget http://lnx.apollo-hw.ro/apache//httpd/httpd-2.4.1.tar.gz

1.3. Extract and Install Apache2.4:

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The Apache Software Foundation officially released the Apache 2.4 today as the first major update to this leading open-source web-server in more than a half-decade. Apache 2.4 is slated to deliver superior performance to its 2.2 predecessor and better compete with the growingly-popular NGINX web-server.

Besides much faster performance, among the many enhancements to the Apache 2.4 HTTP Server is better a-synchronous support in its core, run-time loadable MPMs, reduced memory usage compared to Apache 2.2.x, several new modules, enhancements to existing modules, and much more.

Apache HTTP Server 2.4 provides a number of improvements and enhancements over the 2.2 version.
List here:   http://httpd.apache.org/docs/2.4/new_features_2_4.html

You can download Apache HTTP Server 2.4.1 from:  http://httpd.apache.org/download.cgi

Apache 2.4 comes with new modules like:

mod_heartmonitor, mod_lbmethod_heartbeat

More info here: http://www.apache.org/dist/httpd/Announcement2.4.html

If you have received this error while you were restarting the Apache2 server on Debian Squeeze:

/etc/init.d/apache2 start
Starting web server: apache2apache2: Could not reliably determine the server’s fully qualified domain name, using for ServerName

To fix this problem  you need to edit the /etc/apache2/apache2.conf.

1. Open the /etc/apache2/apache2.conf file with your favorite editor.

vim /etc/apache2/apache2.conf

2. Now add the following line:

ServerName localhost

3. Restart apache2 server:

 /etc/init.d/apache2 restart
Restarting web server: apache2 … waiting ..

Now your problem is gone. Enjoy.

Use the following command:

apache2ctl -M

The output will look like this:

[email protected]:~# apache2ctl -M
Loaded Modules:
core_module (static)
log_config_module (static)
logio_module (static)
mpm_worker_module (static)
http_module (static)
so_module (static)
actions_module (shared)
alias_module (shared)
auth_basic_module (shared)
authn_file_module (shared)
authz_default_module (shared)
authz_groupfile_module (shared)
authz_host_module (shared)
authz_user_module (shared)
autoindex_module (shared)
cgi_module (shared)
cgid_module (shared)
deflate_module (shared)
dir_module (shared)
env_module (shared)
mime_module (shared)
negotiation_module (shared)
reqtimeout_module (shared)
rewrite_module (shared)
rpaf_module (shared)
setenvif_module (shared)
status_module (shared)
Syntax OK
[email protected]:~#

If you have tons of entries like this in apache2 log and you want to get rig of them: – - [07/Feb/2012:02:56:15 +0200] “OPTIONS * HTTP/1.0″ 200 152 “-” “Apache/2.2.16 (Debian) (internal dummy connection)” – - [07/Feb/2012:02:56:16 +0200] “OPTIONS * HTTP/1.0″ 200 152 “-” “Apache/2.2.16 (Debian) (internal dummy connection)” – - [07/Feb/2012:02:56:17 +0200] “OPTIONS * HTTP/1.0″ 200 152 “-” “Apache/2.2.16 (Debian) (internal dummy connection)” – - [07/Feb/2012:02:56:07 +0200] “OPTIONS * HTTP/1.0″ 200 152 “-” “Apache/2.2.16 (Debian) (internal dummy connection)” – - [07/Feb/2012:02:56:20 +0200] “OPTIONS * HTTP/1.0″ 200 152 “-” “Apache/2.2.16 (Debian) (internal dummy connection)” – - [07/Feb/2012:02:56:21 +0200] “OPTIONS * HTTP/1.0″ 200 152 “-” “Apache/2.2.16 (Debian) (internal dummy connection)” – - [07/Feb/2012:02:56:22 +0200] “OPTIONS * HTTP/1.0″ 200 152 “-” “Apache/2.2.16 (Debian) (internal dummy connection)” – - [07/Feb/2012:02:56:23 +0200] “OPTIONS * HTTP/1.0″ 200 152 “-” “Apache/2.2.16 (Debian) (internal dummy connection)”

Here is how to remove them.:

Step1. Edit /etc/apache2/apache2.conf:

vim /etc/apache2/apache2.conf

Here we will create a filter called local or any other name you want:

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