/usr/share/octave/packages/communications-1.2.1/@galois/ is in octave-communications-common 1.2.1-2.
This file is owned by root:root, with mode 0o755.
..
/usr/share/octave/packages/communications-1.2.1/@galois/conv.m
/usr/share/octave/packages/communications-1.2.1/@galois/convmtx.m
/usr/share/octave/packages/communications-1.2.1/@galois/deconv.m
/usr/share/octave/packages/communications-1.2.1/@galois/det.m
/usr/share/octave/packages/communications-1.2.1/@galois/dftmtx.m
/usr/share/octave/packages/communications-1.2.1/@galois/diag.m
/usr/share/octave/packages/communications-1.2.1/@galois/exp.m
/usr/share/octave/packages/communications-1.2.1/@galois/fft.m
/usr/share/octave/packages/communications-1.2.1/@galois/filter.m
/usr/share/octave/packages/communications-1.2.1/@galois/ifft.m
/usr/share/octave/packages/communications-1.2.1/@galois/inv.m
/usr/share/octave/packages/communications-1.2.1/@galois/inverse.m
/usr/share/octave/packages/communications-1.2.1/@galois/isequal.m
/usr/share/octave/packages/communications-1.2.1/@galois/log.m
/usr/share/octave/packages/communications-1.2.1/@galois/lu.m
/usr/share/octave/packages/communications-1.2.1/@galois/prod.m
/usr/share/octave/packages/communications-1.2.1/@galois/rank.m
/usr/share/octave/packages/communications-1.2.1/@galois/reshape.m
/usr/share/octave/packages/communications-1.2.1/@galois/roots.m
/usr/share/octave/packages/communications-1.2.1/@galois/sqrt.m
/usr/share/octave/packages/communications-1.2.1/@galois/sum.m
/usr/share/octave/packages/communications-1.2.1/@galois/sumsq.m