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Installation Guide
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 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 Design Server on Microsoft Windows, install Mongo DB Server version 4.0.5 (or higher) on the same computer. By default, Design Server and MongoDB server is expected to run on the same computer.
  - Design Server installation prerequisites
    To use the Unica Link Design Server, you must install Link Runtime server.
  - Enabling authentication with REST API
    Before installing Design Server or REST API, first enable authentication for the REST API execution time.
- Microsoft Windows installation
  This section describes how to install the Design Server 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 Design Server, the Runtime REST API, and Kafkalink.
- Modifying the configuration in Docker installation or Native installation
  After you install Unica Link you might want to change the HTTP / HTTPS configuration.
- Troubleshooting
- Known issues
  Summary of known issues in this version of the product.

Unica Link upgrade

To upgrade Link, the user must uninstall the previous version of Link using the following commands or steps:


Platform	Commands/Steps
Native	./native-install.sh uninstall
Docker	./link_docker_install.sh uninstall
Microsoft Windows	To uninstall the Design Server, complete the following steps: Open the command line interface. Change the current folder to C:\HCL\Link_<version_number>\DesignServer. To stop and uninstall the Design Server, run the following command clean.bat. Manually delete the folder DesignServer from the location C:\HCL\Link_<version number>\. Uninstall the Windows Link installation completely (Link Design Server comes with Link runtime installation, uninstall runtime component also) by performing the following steps: Click Windows Start button. In the Search box, type `Add or Remove Programs`. Select HCL Link <`Version_Number`> uninstall.

After successful uninstallation, install the new version of Link. For more details, see Installation of Unica Link in Native Mode and Installation of Unica Link in Docker Mode.

Note: Unica Link is currently supported only on the Chrome browser.

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