This file is indexed.

/usr/share/yacas/packages.ys is in yacas 1.3.6-1.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

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Defun(DefFileList,{}) {
    "array.rep/code.ys",
    "assoc.rep/code.ys",
    "base.rep/math.ys",
    "c_form.rep/code.ys",
    "calendar.rep/code.ys",
    "complex.rep/code.ys",
    "constants.rep/code.ys",
    "controlflow.rep/code.ys",
    "debug.rep/code.ys",
    "deffunc.rep/code.ys",
    "deriv.rep/code.ys",
    "example.rep/code.ys",
    "factors.rep/binaryfactors.ys",
    "factors.rep/code.ys",
    "functional.rep/code.ys",
    "graph.rep/code.ys",
    "html.rep/code.ys",
    "integrate.rep/code.ys",
    "io.rep/code.ys",
    "io.rep/defaultprint.ys",
    "limit.rep/code.ys",
    "linalg.rep/code.ys",
    "lists.rep/code.ys",
    "lists.rep/scopestack.ys",
    "localrules.rep/code.ys",
    "logic.rep/code.ys",
    "multivar.rep/code.ys",
    "multivar.rep/sparsetree.ys",
    "newly.rep/code.ys",
    "numbers.rep/GaussianIntegers.ys",
    "numbers.rep/NumberTheory.ys",
    "numbers.rep/code.ys",
    "numbers.rep/nthroot.ys",
    "odesolver.rep/code.ys",
    "openmath.rep/code.ys",
    "orthopoly.rep/code.ys",
    "padic.rep/code.ys",
    "patterns.rep/code.ys",
    "plots.rep/code.ys",
    "plots.rep/plot2d.ys",
    "plots.rep/plot3d.ys",
    "predicates.rep/code.ys",
    "probability.rep/code.ys",
    "pslq.rep/code.ys",
    "rabinmiller.rep/code.ys",
    "radsimp.rep/code.ys",
    "random.rep/code.ys",
    "simplify.rep/code.ys",
    "simplify.rep/factorial.ys",
    "solve.rep/code.ys",
    "specfunc.rep/bernou.ys",
    "specfunc.rep/bessel.ys",
    "specfunc.rep/code.ys",
    "specfunc.rep/gamma.ys",
    "specfunc.rep/gammaconst.ys",
    "specfunc.rep/zeta.ys",
    "standard.ys",
    "statistics.rep/distributions.ys",
    "statistics.rep/hypothesystest.ys",
    "statistics.rep/incompletegamma.ys",
    "statistics.rep/regression.ys",
    "statistics.rep/statistics.ys",
    "stats.rep/code.ys",
    "stdarith.ys",
    "stdfuncs.rep/code.ys",
    "stdfuncs.rep/elemfuncs.ys",
    "stdfuncs.rep/numerical.ys",
    "stdfuncs.rep/nummethods.ys",
    "stubs.rep/code.ys",
    "substitute.rep/code.ys",
    "sums.rep/code.ys",
    "sums.rep/taylor.ys",
    "sums.rep/taylor3.ys",
    "tensor.rep/code.ys",
    "testers.rep/code.ys",
    "texform.rep/code.ys",
    "transforms.rep/code.ys",
    "trigsimp.rep/code.ys",
    "univar.rep/Cyclotomic.ys",
    "univar.rep/code.ys",
    "univar.rep/sparse.ys",
    "univar.rep/sturm.ys",
};