Ensure that your system has at least 100 MB disk space free before proceeding.
Make a directory for the Lucene index files, download, and unpack them.
If you have installed ACT Ontology 4.0 then follow the instructions here for installing the Lucene Index files.
Note: If your system uses a different directory other than /opt/shrine/tomcat/, you will need to make the following change below to your shrine.conf to allow Shrine to locate the the lucene_index files. By default the system looks for the lucene_index in the /opt/shrine/tomcat/lib directory.
Not doing this will result in the following webclient error: Error connecting to: "https://shrinehost/shrine-api/ontology/filterOptions"