https://www.opencascade.com/content/jt-assistant
jtassistant*.tgz
filetar -xvzf jta*.tgz
cd lin64
./JTAssistant.sh
ln -s libTKernel.so.0 libTKBRep.so.0
ln -s libTKernel.so.0 libTKG2d.so.0
ln -s libTKernel.so.0 libTKG3d.so.0
ln -s libTKernel.so.0 libTKGeomBase.so.0
rm libz.so.1
./JTAssistant.sh
tested on: openSUSE tumbleweed 2019/03 Fedora 29