"7"^^ . "How Do I Install or Update Virtuoso Releases across Debian, Ubuntu, RHEL, and CentOS, via the OpenLink Nexus Repo: Step 7" . . . . . . "Apply Virtuoso License\n\nOnce the Virtuoso packages for the target Linux distribution have been installed from the repository, if a valid Virtuoso license (virtuoso.lic) is not already in place, one needs to be added to the directory /etc/oplmgr, and the OpenLink License Manager (oplmgr) then stopped and started with the commands:\n\n sudo service oplmgr { start | status | stop }\n\nIf the Virtuoso server is running, it also needs to stopped and started for the license file to be picked up, with the commands:\n\n sudo service virtuoso { start | status | stop }\n\nFinally, check the /opt/database/virtuoso.log file to ensure the license file is valid and has been accepted for use." .