/usr/include/seqan/seeds2/ is in seqan-dev 1.3-1ubuntu2.
This file is owned by root:root, with mode 0o755.
..
/usr/include/seqan/seeds2/align_chain_banded.h
/usr/include/seqan/seeds2/align_dynprog_affine.h
/usr/include/seqan/seeds2/align_dynprog_banded_affine.h
/usr/include/seqan/seeds2/align_dynprog_banded_linear.h
/usr/include/seqan/seeds2/align_dynprog_linear.h
/usr/include/seqan/seeds2/basic_iter_indirect.h
/usr/include/seqan/seeds2/seeds2_generated_forwards.h
/usr/include/seqan/seeds2/seeds_base.h
/usr/include/seqan/seeds2/seeds_combination.h
/usr/include/seqan/seeds2/seeds_extension.h
/usr/include/seqan/seeds2/seeds_global_chaining.h
/usr/include/seqan/seeds2/seeds_global_chaining_base.h
/usr/include/seqan/seeds2/seeds_global_chaining_gusfield.h
/usr/include/seqan/seeds2/seeds_seed_base.h
/usr/include/seqan/seeds2/seeds_seed_chained.h
/usr/include/seqan/seeds2/seeds_seed_diagonal.h
/usr/include/seqan/seeds2/seeds_seed_set_base.h
/usr/include/seqan/seeds2/seeds_seed_set_non_scored.h
/usr/include/seqan/seeds2/seeds_seed_set_scored.h
/usr/include/seqan/seeds2/seeds_seed_set_unordered.h
/usr/include/seqan/seeds2/seeds_seed_simple.h