/usr/ is in liberis-1.3-dev 1.3.19-5ubuntu2.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/
/usr/lib/x86_64-linux-gnu/
/usr/lib/x86_64-linux-gnu/pkgconfig/
/usr/lib/x86_64-linux-gnu/pkgconfig/eris-1.3.pc
/usr/share/
/usr/share/doc/
/usr/share/doc/liberis-1.3-dev/
/usr/share/doc/liberis-1.3-dev/copyright
/usr/include/
/usr/include/Eris-1.3/
/usr/include/Eris-1.3/Eris/
/usr/include/Eris-1.3/Eris/Operations.h
/usr/include/Eris-1.3/Eris/Task.h
/usr/include/Eris-1.3/Eris/Router.h
/usr/include/Eris-1.3/Eris/Poll.h
/usr/include/Eris-1.3/Eris/Connection.h
/usr/include/Eris-1.3/Eris/PollGlibFD.h
/usr/include/Eris-1.3/Eris/Calendar.h
/usr/include/Eris-1.3/Eris/UIFactory.h
/usr/include/Eris-1.3/Eris/Exceptions.h
/usr/include/Eris-1.3/Eris/ServerInfo.h
/usr/include/Eris-1.3/Eris/TransferInfo.h
/usr/include/Eris-1.3/Eris/TypeInfo.h
/usr/include/Eris-1.3/Eris/iround.h
/usr/include/Eris-1.3/Eris/DeleteLater.h
/usr/include/Eris-1.3/Eris/EntityRouter.h
/usr/include/Eris-1.3/Eris/Room.h
/usr/include/Eris-1.3/Eris/PollWinsock.h
/usr/include/Eris-1.3/Eris/EntityRef.h
/usr/include/Eris-1.3/Eris/ViewEntity.h
/usr/include/Eris-1.3/Eris/BaseConnection.h
/usr/include/Eris-1.3/Eris/TerrainModTranslator.h
/usr/include/Eris-1.3/Eris/Types.h
/usr/include/Eris-1.3/Eris/Lobby.h
/usr/include/Eris-1.3/Eris/TypeService.h
/usr/include/Eris-1.3/Eris/Person.h
/usr/include/Eris-1.3/Eris/Redispatch.h
/usr/include/Eris-1.3/Eris/PollWinsock_impl.h
/usr/include/Eris-1.3/Eris/Account.h
/usr/include/Eris-1.3/Eris/Log.h
/usr/include/Eris-1.3/Eris/MetaQuery.h
/usr/include/Eris-1.3/Eris/SpawnPoint.h
/usr/include/Eris-1.3/Eris/TypeBoundRedispatch.h
/usr/include/Eris-1.3/Eris/TimedEventService.h
/usr/include/Eris-1.3/Eris/CharacterType.h
/usr/include/Eris-1.3/Eris/Metaserver.h
/usr/include/Eris-1.3/Eris/LogStream.h
/usr/include/Eris-1.3/Eris/Factory.h
/usr/include/Eris-1.3/Eris/Alarm.h
/usr/include/Eris-1.3/Eris/TerrainModObserver.h
/usr/include/Eris-1.3/Eris/PollGlibSource.h
/usr/include/Eris-1.3/Eris/Entity.h
/usr/include/Eris-1.3/Eris/PollDefault.h
/usr/include/Eris-1.3/Eris/Timeout.h
/usr/include/Eris-1.3/Eris/Avatar.h
/usr/include/Eris-1.3/Eris/PollGlib.h
/usr/include/Eris-1.3/Eris/IGRouter.h
/usr/include/Eris-1.3/Eris/Response.h
/usr/include/Eris-1.3/Eris/View.h
/usr/lib/x86_64-linux-gnu/liberis-1.3.so
/usr/share/doc/liberis-1.3-dev/changelog.Debian.gz