/usr/lib/debian-med/bin/ is in stacks 1.35-1ubuntu1.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/debian-med/bin/clone_filter
/usr/lib/debian-med/bin/cstacks
/usr/lib/debian-med/bin/denovo_map
/usr/lib/debian-med/bin/denovo_map.pl
/usr/lib/debian-med/bin/estacks
/usr/lib/debian-med/bin/exec_velvet
/usr/lib/debian-med/bin/exec_velvet.pl
/usr/lib/debian-med/bin/export_sql
/usr/lib/debian-med/bin/export_sql.pl
/usr/lib/debian-med/bin/genotypes
/usr/lib/debian-med/bin/hstacks
/usr/lib/debian-med/bin/index_radtags
/usr/lib/debian-med/bin/index_radtags.pl
/usr/lib/debian-med/bin/kmer_filter
/usr/lib/debian-med/bin/load_radtags
/usr/lib/debian-med/bin/load_radtags.pl
/usr/lib/debian-med/bin/load_sequences
/usr/lib/debian-med/bin/load_sequences.pl
/usr/lib/debian-med/bin/phasedstacks
/usr/lib/debian-med/bin/populations
/usr/lib/debian-med/bin/process_radtags
/usr/lib/debian-med/bin/process_shortreads
/usr/lib/debian-med/bin/pstacks
/usr/lib/debian-med/bin/ref_map
/usr/lib/debian-med/bin/ref_map.pl
/usr/lib/debian-med/bin/rxstacks
/usr/lib/debian-med/bin/sort_read_pairs
/usr/lib/debian-med/bin/sort_read_pairs.pl
/usr/lib/debian-med/bin/sstacks
/usr/lib/debian-med/bin/stacks_export_notify
/usr/lib/debian-med/bin/stacks_export_notify.pl
/usr/lib/debian-med/bin/ustacks