This article describes the installation procedure for Kolab 16 on Debian 9 (Stretch).
Install the Aptitude package management tool
# apt-get install aptitude
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/ stretch release updates deb-src https://mirror.kolabenterprise.com/debian/kolab-16/ stretch 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/stretch.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.
During the installation you will get asked which Postfix standard configuration to be used. Select:
Postfix will be configured by the
Aptitude will try to configure 389 LDAP server before it is started. This will result in error messages in the end of the install like these:
● dirsrv-admin.service - 389 Administration Server. Loaded: loaded (/lib/systemd/system/dirsrv-admin.service; disabled; vendor preset: enabled) Active: failed (Result: exit-code) since Fri 2018-08-17 09:14:00 CEST; 6ms ago Process: 30443 ExecStart=/usr/sbin/apache2 -k start -f /etc/dirsrv/admin-serv/httpd.conf (code=exited, status=1/FAILURE)
This is acceptable, as 389 LDAP server will be started and configured by the
Run the setup-kolab script as described in this article.