Installation is easy in Debian but the application is pretty outdated in the squeeze apt repository so you may want to install the latest version manually instead. You can download the source from Sourceforge.

1. Install roundcube

apt-get install roundcube roundcube-mysql


2. Configure apache (pico /etc/apache2/conf.d/roundcube)

Alias /roundcube/program/js/tiny_mce/ /usr/share/tinymce/www/
Alias /roundcube /var/lib/roundcube


3. For some reason the default language is set to ar_SA. Change it to English (pico /var/lib/roundcube/config/main.inc.php)

$rcmail_config['language'] = 'en_US';


4. Restart apache

/etc/init.d/apache2 restart


Now you can access Roundcube on this location: http://yourserver/roundcube

1. Install Apache2 and PHP5 (as an Apache module)

apt-get install apache2 php5 libapache2-mod-php5 php5-mysql


2. Install MySql server

apt-get install mysql-server


3. At this point you may need to restart Apache

/etc/init.d/apache2 restart


3. Create a test php file

echo "<?php phpinfo(); ?>" > /var/www/info.php


The default document root for Debian is in /var/www so you can access the test file on this location: http://yourserver/info.php

3. Install phpMyAdmin (optional but preferred by most developers and administrators)

apt-get install phpmyadmin


By default, phpmyadmin will be accessible on: http://yourserver/phpmyadmin

Trac allows wiki markup in issue descriptions and commit messages, creating links and seamless references between bugs, tasks, changesets, files and wiki pages. A timeline shows all current and past project events in order, making the acquisition of an overview of the project and tracking progress very easy. The roadmap shows the road ahead, listing the upcoming milestones.

Install and configure Trac and subversion

1. Install required packages for both Trac and Subversion. We'll be using Apache to publish the Subversion repositories

apt-get install python-setuptools trac subversion libapache2-svn libapache2-mod-python
a2enmod dav_fs


2. Create a template SVN repository which we will copy later to create new repositories.

mkdir /var/svn/
mkdir /var/svn/tmpproject
mkdir /var/svn/tmpproject/branches
mkdir /var/svn/tmpproject/tags
mkdir /var/svn/tmpproject/trunk

3. Enable the Apache SVN module

a2enmod dav_fs


4. Create a password file containing users that have access to the Subversion repositories and Trac

htpasswd -c /etc/apache2/svn.passwd user1
htpasswd /etc/apache2/svn.passwd user2


5. Edit the apache configurations to enable Trac and Subversion SVN (pico /etc/apache2/sites-enabled/000-default). Add the following lines:

<Location /svn>
DAV svn
SVNParentPath /var/svn
SVNAutoversioning on
AuthType Basic
AuthName "Subversion Repository"
AuthUserFile /etc/apache2/svn.passwd
Require valid-user
</Location>
<Location "/trac">
SetHandler mod_python
PythonHandler trac.web.modpython_frontend
PythonOption TracEnvParentDir /var/trac/
PythonOption TracUriRoot /trac
AuthType Basic
AuthName "Trac"
AuthUserFile /etc/apache2/svn.passwd
Require valid-user
</Location>


6. Create a directory for Trac projects

mkdir /var/trac


Create the first project

1. Create a subversion repository and import the directory structure from the tmpproject template

svnadmin create /var/svn/myproject --fs-type fsfs
svn import /var/svn/tmpproject file:///var/svn/myproject -m "initial import"
find /var/svn/myproject -type f -exec chmod 660 {} \;
find /var/svn/myproject -type d -exec chmod 2770 {} \;
chown -R root.www-data /var/svn/myproject


2. Create the Trac project

trac-admin /var/trac/myproject initenv
find /var/trac/myproject -type f -exec chmod 660 {} \;
find /var/trac/myproject -type d -exec chmod 2770 {} \;
chown -R root.www-data /var/trac/myproject


3. Restart Apache

/etc/init.d/apache2 restart


4. Give a user administrator permissions to the project

trac-admin /var/trac/myproject
permission add user1 TRAC_ADMIN


You can now access your Trac project by browsing with your favorite browser to http://localhost/trac/myproject.

To access the Subversion reposatory you can use any Subversion client. If you're using Windows, TortoiseSVN would be a good choice. The location to the new SVN repository is something like this: http://localhost/svn/myproject

eAccelerator only works with mod_php or php in fastcgi mode. It can't be used in cgi or cli because eAccelerator needs to set up shared memory, and this can only be done when all php instances that need to access it are forks of the first process.

1. Download the eAccelerator source. The latest version is mirrored on www.debiantutorials.com as it's not available on the official site anymore.

cd /tmp
wget http://www.debiantutorials.com/static/eaccelerator-0.9.6.1.tar.bz2


2. Extract

tar -xvjf eaccelerator-0.9.6.1.tar.bz2


3. Install php5-dev

apt-get install php5-dev


3. Compile and install the eAccelerator

phpize
./configure
make
make install


4. Configure eAccelerator as PHP extension (create a new config file: pico /etc/php5/conf.d/eaccelerator.ini)

extension="eaccelerator.so"
eaccelerator.shm_size="16"
eaccelerator.cache_dir="/var/cache/eaccelerator"
eaccelerator.enable="1"
eaccelerator.optimizer="1"
eaccelerator.check_mtime="1"
eaccelerator.debug="0"
eaccelerator.filter=""
eaccelerator.shm_max="0"
eaccelerator.shm_ttl="0"
eaccelerator.shm_prune_period="0"
eaccelerator.shm_only="0"
eaccelerator.compress="1"
eaccelerator.compress_level="9"


5. Create a cache directory

mkdir -p /var/cache/eaccelerator
chmod 0777 /var/cache/eaccelerator


5. Restart apache

/etc/init.d/apache2 restart


1. Install the apache2-mpm-itk package

apt-get install apache2-mpm-itk


2. Configure user and group for each virtual host by adding the following line somewhere between <VirtualHost *:80>...</VirtualHost>

AssignUserId [user] [group]


Replace [user] and [group] with a username and group name that already exists on the system.

3. Change the owner of the web root

chown [user].[group] [location]


Replace [user] and [group] with the username and group name configured on the virtual host. Replace [location] with the location specified as DocumentRoot for the virtual host, eg. /var/www

4. Make sure the location isn't accessible by other users (optional)

chmod o= [location]


Replace [location] with the location specified as DocumentRoot for the virtual host, eg. /var/www

5. Restart apache

/etc/init.d/apache restart


1. Add these lines to the apt sources (pico /etc/apt/sources.list)

deb http://php53.dotdeb.org stable all
deb-src http://php53.dotdeb.org stable all


2. Download and import the dotdeb key

wget http://www.dotdeb.org/dotdeb.gpg
cat dotdeb.gpg | sudo apt-key add -


3. Update apt and dist-upgrade

apt-get update
apt-get dist-upgrade


1. Install Varnish

apt-get install varnish


2. Configure the backend (pico /etc/varnish/default.vcl)

backend default {
set backend.host = "157.166.224.26";
set backend.port = "80";
}


This will be the server containing the actual web site published to the users. I'm using the IP address for cnn.com for testing.

3. Configure deamon options for varnish to use the default.vcl (pico /etc/default/varnish)

Comment out the following lines: (lines 21 - 25)

#DAEMON_OPTS="-a :6081 \
# -T localhost:6082 \
# -b localhost:8080 \
# -u varnish -g varnish \
# -s file,/var/lib/varnish/$INSTANCE/varnish_storage.bin,1G"


Remove the comment blocks from these lines: (34 - 37)

DAEMON_OPTS="-a :6081 \
-T localhost:6082 \
-f /etc/varnish/default.vcl \
-s file,/var/lib/varnish/$INSTANCE/varnish_storage.bin,1G"


By default, Varnish listens on port 6081 as specified in the -a parameter but for production you probably want to use port 80.

4. Restart Varnish

/etc/init.d/varnish restart


5. Test by entering this location in a web browser: http://yourserver:6081.

Replace yourserver with your server's hostname or IP address

This is just a simple setup but you can set up multiple backends and do some advanced configurations. Here's the Varnish documentation

1. Install the PEAR framework

get install php-pear


2. Restart apache

/etc/init.d/apace2 restart


3. Install a PEAR package (optional)

pear install Net_Ping-2.4.5


You can install any PEAR package using this command but in this example we'll install the Net_Ping package

4. Here's a sample PHP code to use the Net_Ping package (optional)

require_once "Net/Ping.php";
$ping = Net_Ping::factory();
 
$host = 'debiantutorials.com';
$count = 3;
 
if (PEAR::isError($ping))
{
    echo $ping->getMessage();
}
else
{
    $ping->setArgs(array('count' => $count));
    $res = $ping->ping($host);
    foreach ($res->_raw_data as $line)
    {
        echo $line . "\n";
    }
}


This code will ping the host debiantutorials.com three times and echo the results

1. Install HAVP

apt-get install havp


2. Start HAVP if it didn't start after the installation

/etc/init.d/havp start


It's ready, by default HAVP listens on port 8080. You can configure your web browser to use the server as a proxy.

You can customize the error pages by editing the html files in this directory: /etc/havp/templates/en/

After a user authenticates themselves, the user's identity will be available in the REMOTE_USER variable. A cookie named open_id_session_id is saved to maintain each user's session.

1. Install the module

apt-get install libapache2-mod-auth-openid


2. Enable the module

a2enmod authopenid


3. You can now add the line below to any Directory, Location or File directive in the virtual host configuration or a .htaccess file .

AuthOpenIDEnabled On


Click here for more configuration options, including only allowing logins from specific OpenID providers and using a custom login page

4. Restart Apache

/etc/init.d/apache2 restart