/usr/share/octave/3.2.4/m/optimization/ is in octave3.2-common 3.2.4-12.
This file is owned by root:root, with mode 0o755.
..
/usr/share/octave/3.2.4/m/optimization/PKG_ADD
/usr/share/octave/3.2.4/m/optimization/PKG_ADD.t
/usr/share/octave/3.2.4/m/optimization/__all_opts__.m
/usr/share/octave/3.2.4/m/optimization/__dogleg__.m
/usr/share/octave/3.2.4/m/optimization/__fdjac__.m
/usr/share/octave/3.2.4/m/optimization/fminunc.m
/usr/share/octave/3.2.4/m/optimization/fsolve.m
/usr/share/octave/3.2.4/m/optimization/fzero.m
/usr/share/octave/3.2.4/m/optimization/glpk.m
/usr/share/octave/3.2.4/m/optimization/glpkmex.m
/usr/share/octave/3.2.4/m/optimization/lsqnonneg.m
/usr/share/octave/3.2.4/m/optimization/optimget.m
/usr/share/octave/3.2.4/m/optimization/optimset.m
/usr/share/octave/3.2.4/m/optimization/qp.m
/usr/share/octave/3.2.4/m/optimization/sqp.m