/usr/include/linbox/randiter/ is in liblinbox-dev 1.1.6~rc0-4.1.
This file is owned by root:root, with mode 0o755.
..
/usr/include/linbox/randiter/abstract.h
/usr/include/linbox/randiter/archetype.h
/usr/include/linbox/randiter/envelope.h
/usr/include/linbox/randiter/gf2.h
/usr/include/linbox/randiter/gmp-random-prime.h
/usr/include/linbox/randiter/gmp-rational.h
/usr/include/linbox/randiter/mersenne-twister.h
/usr/include/linbox/randiter/modular-balanced.h
/usr/include/linbox/randiter/modular.h
/usr/include/linbox/randiter/multimod-randomprime.h
/usr/include/linbox/randiter/nonzero.h
/usr/include/linbox/randiter/ntl-ZZ.h
/usr/include/linbox/randiter/param-fuzzy.h
/usr/include/linbox/randiter/random-fftprime.h
/usr/include/linbox/randiter/random-prime.h
/usr/include/linbox/randiter/unparametric.h