/usr/share/gromacs/tutor/ is in gromacs-data 4.5.5-2.
This file is owned by root:root, with mode 0o755.
..
/usr/share/gromacs/tutor/cleanit
/usr/share/gromacs/tutor/gmxdemo/
/usr/share/gromacs/tutor/gmxdemo/cpeptide.pdb
/usr/share/gromacs/tutor/gmxdemo/demo
/usr/share/gromacs/tutor/methanol/
/usr/share/gromacs/tutor/methanol/conf.gro
/usr/share/gromacs/tutor/methanol/grompp.mdp
/usr/share/gromacs/tutor/methanol/index.ndx
/usr/share/gromacs/tutor/methanol/methanol.itp
/usr/share/gromacs/tutor/methanol/methanol.pdb
/usr/share/gromacs/tutor/methanol/topol.top
/usr/share/gromacs/tutor/mixed/
/usr/share/gromacs/tutor/mixed/conf.gro
/usr/share/gromacs/tutor/mixed/grompp.mdp
/usr/share/gromacs/tutor/mixed/index.ndx
/usr/share/gromacs/tutor/mixed/mixed.pdb
/usr/share/gromacs/tutor/mixed/topol.top
/usr/share/gromacs/tutor/nmr1/
/usr/share/gromacs/tutor/nmr1/conf.gro
/usr/share/gromacs/tutor/nmr1/grompp.mdp
/usr/share/gromacs/tutor/nmr1/pep.pdb
/usr/share/gromacs/tutor/nmr1/topol.top
/usr/share/gromacs/tutor/nmr2/
/usr/share/gromacs/tutor/nmr2/conf.gro
/usr/share/gromacs/tutor/nmr2/genconf.gcp
/usr/share/gromacs/tutor/nmr2/grompp.mdp
/usr/share/gromacs/tutor/nmr2/pep.pdb
/usr/share/gromacs/tutor/nmr2/topol.top
/usr/share/gromacs/tutor/speptide/
/usr/share/gromacs/tutor/speptide/em.mdp
/usr/share/gromacs/tutor/speptide/full.mdp
/usr/share/gromacs/tutor/speptide/pr.mdp
/usr/share/gromacs/tutor/speptide/speptide.pdb
/usr/share/gromacs/tutor/water/
/usr/share/gromacs/tutor/water/conf.gro
/usr/share/gromacs/tutor/water/grompp.mdp
/usr/share/gromacs/tutor/water/index.ndx
/usr/share/gromacs/tutor/water/spc216.pdb
/usr/share/gromacs/tutor/water/topol.top