/usr/ is in octave-io 1.0.14-2.
This file is owned by root:root, with mode 0o755.
..
/usr/share/
/usr/share/octave/
/usr/share/octave/packages/
/usr/share/octave/packages/3.2/
/usr/share/octave/packages/3.2/io-1.0.14/
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/usr/share/octave/packages/3.2/io-1.0.14/append_save.m
/usr/share/octave/packages/3.2/io-1.0.14/parsecell.m
/usr/share/octave/packages/3.2/io-1.0.14/ods2oct.m
/usr/share/octave/packages/3.2/io-1.0.14/xlsopen.m
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/usr/share/octave/packages/3.2/io-1.0.14/oct2ods.m
/usr/share/octave/packages/3.2/io-1.0.14/odsfinfo.m
/usr/share/octave/packages/3.2/io-1.0.14/getusedrange.m
/usr/share/octave/packages/3.2/io-1.0.14/xlswrite.m
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/usr/share/octave/packages/3.2/io-1.0.14/calccelladdress.m
/usr/share/octave/packages/3.2/io-1.0.14/xlsread.m
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/usr/share/octave/packages/3.2/io-1.0.14/odsopen.m
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/usr/share/octave/packages/3.2/io-1.0.14/packinfo/.autoload
/usr/share/octave/packages/3.2/io-1.0.14/packinfo/DESCRIPTION
/usr/share/octave/packages/3.2/io-1.0.14/xlsfinfo.m
/usr/share/doc/
/usr/share/doc/octave-io/
/usr/share/doc/octave-io/copyright
/usr/share/doc/octave-io/changelog.Debian.gz