GROMACS RMSD COMMANDS

Question

[adammbbs]

hi I run protein ligand simulation using gromacs 5.0.4.my final RMSD nm output graph started from 5.2 nm not from 0 nm...i could not able to find the mistake for these result. pls any one tell me gromacs command for final RMSD, DSSP,RMSF and hydrogen bonds.