This article describes the installation procedure for Kolab 16 on Ubuntu 18.04 LTS (Bionic).
Install Required Packages
Several packages are required to start off the installation, that may or may not be already installed on your system. Please install those packages;
# apt-get install aptitude apt-transport-https gnupg wget
Install the GPG Signature
Install the public key used to sign the repository metadata with:
# wget -q -O- https://mirror.kolabenterprise.com/bionic.asc | apt-key add -
Configure the Kolab Software Repositories
NOTE: The Ubuntu 18.04 Universe software repository needs to be enabled, but may not be by default. Please see external references.
Add the following two lines to
deb https://mirror.kolabenterprise.com/ubuntu/kolab-16/ bionic release updates deb-src https://mirror.kolabenterprise.com/ubuntu/kolab-16/ bionic release updates
Set the Repository Priority
To ensure the Kolab packages have priority over the Debian packages, such as must be the case for PHP as well as Cyrus IMAP, please make sure the APT preferences pin the mirror.kolabsys.com origin as a preferred source.
Put the following in
Package: * Pin: origin mirror.kolabenterprise.com Pin-Priority: 501
Update the repository metadata:
# apt-get update
Start the installation of the base package as follows:
# aptitude install kolab
When asked to confirm you want to install the package and its dependencies, press Enter.
NOTE: When you are asked for the preferred default configuration of Postfix, either choose ‘No configuration’ or ‘Internet Site’.
Run the setup-kolab script as described in this article.