How to Install Kolab Groupware on CentOS 7

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Kolab Groupware is a free and open source web-based groupware application. Its features consist of email communications, events, appointments, tasks, file cloud, contacts, and more. In this tutorial, you will learn how to install the latest version of Kolab Groupware on CentOS 7.


  • A Vultr CentOS 7 server instance.
  • A sudo user.

Step 1: Software update

Before installing any packages on the CentOS server instance, it is recommended to update the system. Log into the system using the sudo user, then run the following commands to update the system.

sudo yum -y install epel-releasesudo yum -y updatesudo shutdown -r now

Wait for the system to reboot, then log in again as the sudo user.

Step 2: Set hostname

It is important that your system has an FQDN (full qualified domain name) for a hostname that resolves back to the server through DNS.

sudo hostnamectl

Edit the /etc/hosts file using your favorite editor.

sudo nano /etc/hosts

Enter the IP address and full FQDN of your server at the end of the file. For example:

Step 3: Disable SELinux

SELinux policies conflicts with some modules of Kolab Groupware, hence you will need to disable SELinux on your server. With Vultr instances, SELinux is disabled by default. Check SELinux status.


To temporary disable SELinux, run the following command.

sudo setenforce 0

To completely disable SELinux, you will need to edit /etc/selinux/config file.

sudo nano /etc/selinux/config

Find the following line:


Then change it to:


And finally, reboot the server. Log back in once the reboot completes.

sudo shutdown -r now

Step 4: Configure firewall

Allow the ports needed by Kolab Groupware through the system firewall.

sudo firewall-cmd --permanent --add-service=http sudo firewall-cmd --permanent --add-service=https sudo firewall-cmd --permanent --add-service=pop3s sudo firewall-cmd --permanent --add-service=imaps sudo firewall-cmd --permanent --add-service=smtp sudo firewall-cmd --permanent --add-service=ldap sudo firewall-cmd --permanent --add-service=ldapssudo firewall-cmd --permanent --add-port=110/tcp sudo firewall-cmd --permanent --add-port=143/tcp sudo firewall-cmd --permanent --add-port=587/tcpsudo firewall-cmd --reload

Step 5: Install Kolab

Add the Kolab Groupware repository and GPG key to the system.

sudo wget -O /etc/yum.repos.d/Kolab:16.reposudo rpm --import

Install the yum-plugin-priorities package.

sudo yum -y install yum-plugin-priorities

Give Kolab repository a higher priority over the EPEL repository using the following command.

 sudo bash -c 'for f in /etc/yum.repos.d/Kolab*.repo; do echo "priority = 60" >> $f; done'

Install Kolab Groupware.

sudo yum -y install kolab

Step 6: Configure Kolab

Run the following command to configure the Kolab for first time. You will need to set a few administrator passwords for LDAP, Cyrus, and Kolab during this step. You will also need to set the domain name and MySQL database being used.

sudo setup-kolab

The following questions will be asked during setup, please follow the instructions provided along with them.

Administrator password:                            #Provide LDAP admin password for default user 'admin'Directory Manager password [qhZlb2P9OYubDJv]:      #Provide LDAP directory manger passwordUser [dirsrv]:                                     #Press enter to use defaultGroup [dirsrv]:                                    #Press enter to use [Y/n]:                             #Check or provide the domain name, it may not be a full FQDNdc=rackvoucher,dc=com [Y/n]:                       #Press enterCyrus Administrator password [Awt7z1O2UTl-HZs]:    #Provide Cyrus admin passwordKolab Service password [T_T4ut8pvE_G_Os]:          #Provide Kolab service admin passwordWhat MySQL server are we setting up? - 1: Existing MySQL server (with root password already set). - 2: New MySQL server (needs to be initialized).Choice: 2                                          #Provide choice 2 to initialize MySQL serverMySQL root password [E7FIj_MWGNEVXPF]:             #Provide new MySQL root passwordMySQL kolab password [8MYG_Hveb4FPCW3]:            #Provide Kolab DB user passwordTimezone ID [UTC]: Asia/Kolkata                    #Provide appropriate timezoneMySQL roundcube password [iz3gP7sqaBa6Vh6]:        #Provide Roundcube DB user password

Kolab is now installed and configured on your server. You can visit the following address to access the Kolab web interface.


Login with the username cn=Directory Manager and the password of the directory manager set during Kolab Setup. You will be presented with the Kolab Groupware dashboard.

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