/usr/ is in octave-missing-functions 1.0.2-5.
This file is owned by root:root, with mode 0o755.
..
/usr/share/
/usr/share/doc/
/usr/share/doc/octave-missing-functions/
/usr/share/doc/octave-missing-functions/copyright
/usr/share/doc/octave-missing-functions/changelog.Debian.gz
/usr/share/octave/
/usr/share/octave/packages/
/usr/share/octave/packages/missing-functions-1.0.2/
/usr/share/octave/packages/missing-functions-1.0.2/packinfo/
/usr/share/octave/packages/missing-functions-1.0.2/packinfo/DESCRIPTION
/usr/share/octave/packages/missing-functions-1.0.2/packinfo/.autoload
/usr/share/octave/packages/missing-functions-1.0.2/packinfo/INDEX
/usr/share/octave/packages/missing-functions-1.0.2/doc-cache
/usr/share/octave/packages/missing-functions-1.0.2/__matlabfunctionlist__.m
/usr/share/octave/packages/missing-functions-1.0.2/__functionstatus__.m
/usr/share/octave/packages/missing-functions-1.0.2/__missingmatlab2txt__.m
/usr/share/octave/packages/missing-functions-1.0.2/missingfunctionstatus.m
/usr/share/octave/packages/missing-functions-1.0.2/missingmatlabfunctions.m