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Installation Guide
Unica Link prerequisites
Ensure that these prerequisites are met before installing Unica Link.
Docker installation prerequisites

Installation Guide
- Introduction to Unica Link
  Unica Link is a component that can be installed separately from the Unica application.
- Unica Link prerequisites
  Ensure that these prerequisites are met before installing Unica Link.
  - Unica Link upgrade
    To upgrade Link, the user must uninstall the previous version of Link using the following commands or steps:
  - Installation prerequisites for Linux
    You need Linux for Native and Docker Installation. The system requirements for Linux are as follows:
  - Docker installation prerequisites
  - Native installation prerequisites
    Ensure that these system requirements are met before you perform the Native installation of Unica Link:
  - Microsoft Windows installation prerequisites
    Before you install Link on Microsoft Windows, install Mongo DB Server version 4.0.5 (or higher) on the same computer. By default, Link and MongoDB server is expected to run on the same computer.
  - Link installation prerequisites
    To use Unica Link, you must install Link Runtime server.
  - Enabling authentication with REST API
    Before installing Link or REST API, first enable authentication for the REST API execution time.
  - Link to Proxy Server Documentation
    Click on the following link to access Proxy Server documentation in Link 1.1.4:
- Microsoft Windows installation
  This section describes how to install Link using the Windows Installer.
- Linux Installation
  You can install Unica Link in two modes:
- Setting up Journey and Campaign for Unica Link
- Logging
  Logs are produced for your use by Link, the Runtime REST API, and Kafkalink.
- Enabling Unica Link to run on HTTP protocol for Windows and Linux Installation
- Troubleshooting
- Known issues
  Summary of known issues in this version of the product.

Docker installation prerequisites

Ensure that the following system requirements are met prior to performing the Docker installation of Unica Link.

Linux dockerized container - "Docker Engine" is required in order to run Docker containers.
Tomcat Version 9.0.14 - Automatically downloads.
MongoDB Version 4.0.5 - Automatically downloads.
Redis cache - Automatically downloads.

These prerequisites must be satisfied before you perform a Docker installation of Unica Link:

Kafka must be installed and request and reply topics must be created with the appropriate topic names specified in the kafalink.properties file.
Docker must be installed and running.
Any previous installation of Unica must be fully removed by using the uninstall command of the ./Link uninstall script.

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