How to Enable mod_rewrite in apache2

First install the apache with this command :-
apt-get install apache2

Now use locate to find if the mod_rewrite.so is availble on your server :-
updatedb
locate mod_rewrite.so
it will found in “/usr/lib/apache2/modules”

New apache follow some folders to enable and disable mods so now do this :-
cd /etc/apache2/mods-enabled
touch rewrite.load
vim rewrite.load (you may use any editor to edit this file)

Now paste this following line :-
LoadModule rewrite_module /usr/lib/apache2/modules/mod_rewrite.so

Then edit :-
/etc/apache2/sites-available/default

Find the following :-
Options Indexes FollowSymLinks MultiViews
AllowOverride None
Order allow,deny
allow from all

and change it to

Options Indexes FollowSymLinks MultiViews
AllowOverride all
Order allow,deny
allow from all

and finally restart Apache :-
/etc/init.d/apache2 restart

OK, you done :D