Multisite Drupal 6 Configuration

Use the following commands, here I have taken example of my system and "arvind" as a working directory.

1: cd /home/arvind/

2: mkdir drupal6

3: cd drupal6

4: mkdir logs

5: wget http://ftp.drupal.org/files/projects/drupal-6.22.tar.gz

6: tar xvzf drupal-6.22.tar.gz

7: mv drupal-6.22.tar.gz htdocs

8: cd logs

9: cat > error.log

10: cat > access.log

11: pwd

ex:/home/arvindaithal/drupal6/htdocs

12: Go to cd /etc/apache2/sites-available

       Ex:arvindaithal@hoodota:/home$ cd /etc/apache2/sites-available/
       arvindaithal@hoodota:/etc/apache2/sites-available$ ls
              default  defaultbk  default-ssl
       arvindaithal@hoodota:vim default

    Make these changes.
<VirtualHost *:80>
        ServerAdmin webmaster@localhost

         DocumentRoot /home/arvindaithal/drupal6/htdocs/
        <Directory />
                Options FollowSymLinks
                AllowOverride All
        </Directory>
        <Directory /home/arvindaithal/drupal6/htdocs/>
                 Options Indexes FollowSymLinks MultiViews
                 AllowOverride All
                 Order allow,deny
                 allow from all
        </Directory>

        ScriptAlias /cgi-bin/ /usr/lib/cgi-bin/
        <Directory "/usr/lib/cgi-bin">
                 AllowOverride None
                 Options +ExecCGI -MultiViews +SymLinksIfOwnerMatch
                     Order allow,deny
                     Allow from all
        </Directory>

         ErrorLog ${APACHE_LOG_DIR}/error.log

        # Possible values include: debug, info, notice, warn, error, crit,
        # alert, emerg.
         LogLevel warn

         CustomLog ${APACHE_LOG_DIR}/access.log combined

    Alias /doc/ "/usr/share/doc/"
        <Directory "/usr/share/doc/">
            Options Indexes MultiViews FollowSymLinks
        AllowOverride None
        Order deny,allow
        Deny from all
            Allow from 127.0.0.0/255.0.0.0 ::1/128
    </Directory>

</VirtualHost>

Alias /test "/home/arvindaithal/drupal6/htdocs/"
Alias /testsite "/home/arvindaithal/drupal6/htdocs"

13: mkdir 127.0.0.1.test

14: cd ..

15: Change the rewrite base.

vim .htaccess

      ex:arvindaithal@hoodota:~/drupal6/htdocs$ vim .htaccess 
        Add this code(test refers your site name).
            RewriteCond %{REQUEST_FILENAME} !-f
    RewriteCond %{REQUEST_FILENAME} !-d
    RewriteCond %{REQUEST_URI} ^/test/(.*)$
    RewriteRule ^(.*)$ /test/index.php?q=$1 [L,QSA]

16: sudo /etc/init.d/apache2 restart

17: 127.0.0.1/test/

18: Make writable settings.php and files.

19: Give database name and password and save.,

20: Copy settings.php and files in 121.0.0.1.testsite/

21: Save.

If you need further information please refer this link http://drupal.org/node/43816.