/usr/lib/x86_64-linux-gnu/ibdm1.5.7/ibnl/ is in libibdm1v5 1.5.7-3ubuntu3.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/x86_64-linux-gnu/ibdm1.5.7/ibnl/Buffalo.ibnl
/usr/lib/x86_64-linux-gnu/ibdm1.5.7/ibnl/Buffalo8.topo
/usr/lib/x86_64-linux-gnu/ibdm1.5.7/ibnl/Cheetah.ibnl
/usr/lib/x86_64-linux-gnu/ibdm1.5.7/ibnl/Cougar.ibnl
/usr/lib/x86_64-linux-gnu/ibdm1.5.7/ibnl/Eagle.ibnl
/usr/lib/x86_64-linux-gnu/ibdm1.5.7/ibnl/FullGnu.topo
/usr/lib/x86_64-linux-gnu/ibdm1.5.7/ibnl/Gazelle.ibnl
/usr/lib/x86_64-linux-gnu/ibdm1.5.7/ibnl/Gnu.ibnl
/usr/lib/x86_64-linux-gnu/ibdm1.5.7/ibnl/IS4_NATIVE.ibnl
/usr/lib/x86_64-linux-gnu/ibdm1.5.7/ibnl/IS5100.ibnl
/usr/lib/x86_64-linux-gnu/ibdm1.5.7/ibnl/IS5200.ibnl
/usr/lib/x86_64-linux-gnu/ibdm1.5.7/ibnl/IS5300.ibnl
/usr/lib/x86_64-linux-gnu/ibdm1.5.7/ibnl/Lion.ibnl
/usr/lib/x86_64-linux-gnu/ibdm1.5.7/ibnl/LionMini.ibnl
/usr/lib/x86_64-linux-gnu/ibdm1.5.7/ibnl/MIS5600.ibnl
/usr/lib/x86_64-linux-gnu/ibdm1.5.7/ibnl/MTS14400-48.ibnl
/usr/lib/x86_64-linux-gnu/ibdm1.5.7/ibnl/MTS14400-DDR.ibnl
/usr/lib/x86_64-linux-gnu/ibdm1.5.7/ibnl/MTS14400-IntraDDR.ibnl
/usr/lib/x86_64-linux-gnu/ibdm1.5.7/ibnl/MTS14400.ibnl
/usr/lib/x86_64-linux-gnu/ibdm1.5.7/ibnl/MTS2400-12T4.ibnl
/usr/lib/x86_64-linux-gnu/ibdm1.5.7/ibnl/MTS2400-24.ibnl
/usr/lib/x86_64-linux-gnu/ibdm1.5.7/ibnl/MTS3600.ibnl
/usr/lib/x86_64-linux-gnu/ibdm1.5.7/ibnl/MTS3610.ibnl
/usr/lib/x86_64-linux-gnu/ibdm1.5.7/ibnl/PartialGazelle.topo
/usr/lib/x86_64-linux-gnu/ibdm1.5.7/ibnl/RhinoBased512.lst
/usr/lib/x86_64-linux-gnu/ibdm1.5.7/ibnl/RhinoBased512.no_sp2-3.lst
/usr/lib/x86_64-linux-gnu/ibdm1.5.7/ibnl/RhinoBased512.topo
/usr/lib/x86_64-linux-gnu/ibdm1.5.7/ibnl/SUNBQNEM48.ibnl
/usr/lib/x86_64-linux-gnu/ibdm1.5.7/ibnl/SUNDCS36QDR.ibnl
/usr/lib/x86_64-linux-gnu/ibdm1.5.7/ibnl/SUNDCS648QDR.ibnl
/usr/lib/x86_64-linux-gnu/ibdm1.5.7/ibnl/SUNDCS72QDR.ibnl
/usr/lib/x86_64-linux-gnu/ibdm1.5.7/ibnl/SingleGazelle.topo
/usr/lib/x86_64-linux-gnu/ibdm1.5.7/ibnl/SingleRhino.topo
/usr/lib/x86_64-linux-gnu/ibdm1.5.7/ibnl/subnet.lst