Unimus requires that you have Java (JRE) installed.
You can get Java from here: https://java.com/en/download/manual.jsp
On Linux, many distributions contain JREs in their package repositories.
You can install "openjdk-8-jre" or "oracle-java8-jre" packages.
All the deployment options are listed on the download page:
https://unimus.net/download.html
Documentation is available on our Wiki:
https://wiki.unimus.net/display/UNPUB/Installing+Unimus