/usr/share/octave/site/m/sundialsTB/idas/examples_ser/ is in octave-sundials 2.5.0-3+b1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/octave/site/m/sundialsTB/idas/examples_ser/midasBruss_ASA_dns.m
/usr/share/octave/site/m/sundialsTB/idas/examples_ser/midasBruss_dns.m
/usr/share/octave/site/m/sundialsTB/idas/examples_ser/midasHeat2D_bnd.m
/usr/share/octave/site/m/sundialsTB/idas/examples_ser/midasPendI1_dns.m
/usr/share/octave/site/m/sundialsTB/idas/examples_ser/midasPendI2_dns.m
/usr/share/octave/site/m/sundialsTB/idas/examples_ser/midasReInit_dns.m
/usr/share/octave/site/m/sundialsTB/idas/examples_ser/midasRoberts_ASAi_dns.m
/usr/share/octave/site/m/sundialsTB/idas/examples_ser/midasRoberts_dns.m
/usr/share/octave/site/m/sundialsTB/idas/examples_ser/midasSlCrank_FSA_dns.m
/usr/share/octave/site/m/sundialsTB/idas/examples_ser/midasSlCrank_dns.m