Installation Debian specific Install Apache and php and modules Install Database Install Horde Groupware Installation Horde Groupware requires some prerequisite software before you can use it. In addition, there are other software packages which, while not required, are recommended as without them you will experience very limited functionality. The following helps you to install the required and recommended software packages on a Debian Etch (4.0) System. *There is also a Horde 'Groupware Webmail Edition' this will not be the part of this how to* *This how to will not cover your mailserver setup.* *Note: this how to is just a draft and not really perfect - feel free to edit it and make it better* Debian specific I started with a new and fresh Debian(openvz-image) You should update your system. apt-get update && apt-get dist-upgrade Install Apache and php and modules apt-get install libapache2-mod-php5 apache2 apache2-mpm-prefork You need the cli for the horde setup script! apt-get install php5-cli These php modules are needed for horde Groupware apt-get install php-pear php5-gd php5-ldap php5-mcrypt php5-memcache For webmail you need the imap extension apt-get install php5-imap If you want to use mysql as Database backend, you should install the php5-mysql extension apt-get install php5-mysql If you want to you postgresql as Database backend install php5-pgsql apt-get install php5-pgsql Install Database For Mysql apt-get install mysql-server You will be asked for a mysqlroot password - don't forget it ;) After that you need to create a user and create grants. mysql -p -e 'CREATE USER HORDE ...' mysql -p -e 'grant all on horde.* to horde@localhost identified by "horde";' Install Horde Groupware Download and unpack it wget [tarball] cd /root tar -xvf horde-webmail-1.0.1.tar.gz copy to /var/www and change owner cp -r /root/horde-webmail-1.0.1 /var/www/horde chown -r www-data:www-data horde with php5-cli start the setup script php5 -q /var/www/horde/scripts/setup.php