Citadel is a groupware suite that provides system administrators with an easy method to set up and manage email, calendars, mailing lists and other collaboration tools. It also features an automated installation process and versatile deployment options that allow the application to be scaled across multiple servers.
There is a known bug that prevents Citadel from running properly on 32-bit Linodes. Please see the Ubuntu bugtracker for more information.
Before installing Citadel, it is assumed that you have followed our getting started guide. If you're new to Linux server administration, you may be interested in our using Linux document series including the beginner's guide and administration basics guide.
This guide also assumes that you wish to run Citadel by itself on this server on port 80 or 443 for browser-based access.
If you intend to install Citadel alongside another web server package such as Apache or nginx, select the "internal" option when asked about web server integration. Be sure to specify unique ports for Citadel such as 8080 for HTTP or 4343 for HTTPS.
Before you begin installing and configuring the components described in this guide, please make sure you've followed our instructions for setting your hostname. Issue the following commands to make sure it is set properly:
hostname hostname -f
The first command should show your short hostname, and the second should show your fully qualified domain name (FQDN).
Issue the following commands to install any outstanding package updates:
apt-get update apt-get upgrade
Issue the following commands to install the citadel-suite, spamassassin and amavisd-new packages:
apt-get install citadel-suite spamassassin amavisd-new
The installation process will prompt you to answer a couple of questions. Use the answers provided below:
If you need to reconfigure any of these options later, you can use the following command:
Edit the /etc/mailname file to reflect your system's domain name:
You'll need to edit the SpamAssassin configuration file to enable spamd:
# Change to one to enable spamd ENABLED=1
Start the spamassassin service as follows:
Please note that you'll finish enabling SpamAssassin support within Citadel later in the "Notes" section.
Customize the login banner for your Citadel server by editing the relevant file:
Citadel Groupware Server Login
Use the following startup script to initialize Citadel.
Visit the web interface in your Web browser. Using our preceding example, the Web address to visit would look like:
The SSL certificate for your Citadel web interface will be self-signed; accept it to continue. If you don't get a login page in your web browser, you may need to start "webcit" with the following command:
At this point, your email system should be fully functional and can be configured through the Webcit interface. When you log in for the first time as "Administrator", you will not need a password. However, it is recommended that you set a password as soon as possible under the "Advanced" tab.
To finish enabling SpamAssassin support, select "Administration" in the control panel. Next, click "Domain names and Internet mail configuration". Enter "127.0.0.1" in the box for the SpamAssassin host.
If you lose the password to your administrator account, re-run the setup as follows:
Specify a different name for the admin user and restart Citadel as follows:
You should be able to log in as the new admin user with no password. You may then reset the password for your original administrator account. After this is done, log back in as the original administrator and delete the temporary admin account.
You may wish to consult the following resources for additional information on this topic. While these are provided in the hope that they will be useful, please note that we cannot vouch for the accuracy or timeliness of externally hosted materials.
This guide is licensed under a Creative Commons Attribution-NoDerivs 3.0 United States License.
Last edited by Bobbi L on Tuesday, February 18th, 2014 (r4263).