This article describes the installation procedure for Kolab 16 on Ubuntu 18.04 LTS (Bionic).
Install the APT plugin for HTTPS transport
# aptitude -y install apt-transport-https
Configure the Kolab Software Repositories
Add the following two lines to
deb https://mirror.kolabenterprise.com/debian/kolab-16/ jessie release updates deb-src https://mirror.kolabenterprise.com/debian/kolab-16/ jessie 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
Install the GPG Signature
Install the public key used to sign the repository metadata with:
# wget -q -O- https://ssl.kolabsys.com/jessie.asc | apt-key add -
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: Depending on your current Debian installation, you may be prompted to confirm the removal of Exim4 in favor of the installation of Postfix, as shown in the following text console output snippet;
The following packages have unmet dependencies: postfix : Conflicts: mail-transport-agent which is a virtual package. exim4-daemon-light : Conflicts: mail-transport-agent which is a virtual package. exim4-config : Conflicts: postfix but 2.11.3-1+deb8u2 is to be installed. The following actions will resolve these dependencies: Remove the following packages: 1) exim4 2) exim4-base 3) exim4-config 4) exim4-daemon-light Accept this solution? [Y/n/q/?]
Accept this solution by pressing Enter.
Run the setup-kolab.com script as described in this article.