/usr/ is in octave-odepkg 0.8.4-1build1.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/
/usr/lib/x86_64-linux-gnu/
/usr/lib/x86_64-linux-gnu/octave/
/usr/lib/x86_64-linux-gnu/octave/packages/
/usr/lib/x86_64-linux-gnu/octave/packages/odepkg-0.8.4/
/usr/lib/x86_64-linux-gnu/octave/packages/odepkg-0.8.4/x86_64-pc-linux-gnu-api-v49+/
/usr/lib/x86_64-linux-gnu/octave/packages/odepkg-0.8.4/x86_64-pc-linux-gnu-api-v49+/PKG_ADD
/usr/lib/x86_64-linux-gnu/octave/packages/odepkg-0.8.4/x86_64-pc-linux-gnu-api-v49+/dldsolver.oct
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