Setting up a Subversion repository and corresponding Trac app on a (Debian/Apache) server

As of (almost) anything there's also a good howto on the Web for that.
Here are the basic/central steps to take.

Subversion

1. Install the required packages.
   sudo aptitude install enscript libapache2-mod-python python-docutils trac db4.3-util libapache2-svn subversion-tools
2. Create a virtual host dir for SVN.
   sudo mkdir -p /var/local/www/svn/svn.example.com
3. Create a development group, and add the web user to it.
   sudo addgroup example; sudo adduser www-data example
4. Add users to the development group. These are persons that need access to the repository.
   sudo adduser username1 example
   sudo adduser username2 example
   sudo adduser username3 example
   ...
5. Set proper permissions.
   sudo chmod 2770 /var/local/www/svn/svn.example.com
6. Set up the repository.
   sudo svnadmin create /var/local/www/svn/svn.example.com
7. Clear the current password file (we'll be using HTTPS).
   sudo rm /var/local/www/svn/svn.example.com/conf/passwd
   sudo touch /var/local/www/svn/svn.example.com/conf/passwd
8. Allow the group to write to the repository.
   sudo chmod -R g+w /var/local/www/svn/svn.example.com
9. Set proper file ownership.
   sudo chown -R www-data:example /var/local/www/svn/svn.example.com
10. Set the repository access permissions. (see)
    sudo vi /var/local/www/svn/svn.example.com/conf/authz
11. Create a dir for the log files.
    sudo mkdir /var/log/apache2/svn.example.com
12. Add the site to the log rotation list.
    sudo vi /etc/logrotate.d/apache2
13. Configure the virtual host.
    sudo vi /etc/apache2/sites-available/svn.example.com
    
# Subversion Configuration
<VirtualHost [server's IP address]:80>
ServerName svn.example.com
Redirect / https://svn.example.com/
</VirtualHost>
<VirtualHost [server's IP address]:443>
ServerName svn.example.com
<Location />
DAV svn
AuthType Basic
AuthName "svn.example.com"
AuthUserFile /var/local/www/svn/svn.example.com/conf/passwd
AuthzSVNAccessFile /var/local/www/svn/svn.example.com/conf/authz
SVNPath /var/local/www/svn/svn.example.com
Require valid-user
</Location>
CustomLog /var/log/apache2/svn.example.com/access.log combined
ErrorLog /var/log/apache2/svn.example.com/error.log
SSLEngine on
SSLCertificateFile /etc/apache2/ssl/apache.pem
# Add this once there is a real (non self-signed) certificate.
# SSLCertificateKeyFile /etc/apache2/ssl/server.key
</VirtualHost>

14. Enable the subversion virtual host.
    sudo a2ensite svn.example.com
15. Create user/password combinations.
    sudo htpasswd /var/local/svn/svn.example.com/conf/passwd username
16. Reload the Web server conf.
    sudo /etc/init.d/apache2 reload

Trac

1. Create the Web dir.
   sudo mkdir -p /var/local/www/trac/trac.example.com
2. Set proper permissions.
   sudo chmod 2770 /var/local/www/trac/trac.example.com
3. Create a Trac instance.
   sudo trac-admin /var/local/www/trac/trac.example.com initenv
4. Set proper ownership on the Web dir.
   sudo chown -R www-data:example /var/local/www/trac/trac.example.com
5. Allow the group to write to the repository.
   sudo chmod -R g+w /var/local/www/trac/trac.example.com
6. Configure it.
   sudo vi /var/local/www/trac/trac.example.com/conf/trac.ini
7. Create a dir for the log files.
   sudo mkdir /var/log/apache2/trac.example.com
8. Add the site to the log rotation list.
   sudo vi /etc/logrotate.d/apache2
9. Configure the virtual host...
   sudo vi /etc/apache2/sites-available/trac.example.com
   
# Trac Configuration
<VirtualHost [server's IP address]:80>
ServerName trac.example.com
Redirect / https://trac.example.com/
</VirtualHost>
<VirtualHost [server's IP address]:443>
ServerName trac.example.com
DocumentRoot /var/local/www/trac/trac.example.com/
Alias /trac/ /usr/share/trac/htdocs
<Directory "/usr/share/trac/htdocs/">
Options Indexes MultiViews
AllowOverride None
Order allow,deny
Allow from all
</Directory>
<Location />
SetHandler mod_python
PythonHandler trac.web.modpython_frontend
PythonInterpreter main_interpreter
PythonOption TracEnv /var/local/www/trac/trac.example.com/
PythonOption TracUriRoot /
AuthType Basic
AuthName "trac.example.com"
# Use the SVN password file.
AuthUserFile /var/local/svn/svn.example.com/conf/passwd
Require valid-user
</Location>
CustomLog /var/log/apache2/trac.example.com/access.log combined
ErrorLog /var/log/apache2/trac.example.com/error.log
SSLEngine on
SSLCertificateFile /etc/apache2/ssl/apache.pem
# Add this once there is a real (non self-signed) certificate.
# SSLCertificateKeyFile /etc/apache2/ssl/server.key
</VirtualHost>

10. Enable the Trac virtual host.
    sudo a2ensite trac.example.com
11. Configure Trac permissions.
    sudo trac-admin /var/local/www/trac/trac.example.com
12. Restart the Web server.
    sudo /etc/init.d/apache2 restart

Have fun! :-)