Mend and add hydrogens to PDB files
apt install python2 gawk
python3 -m pip install pdbmender
PDBmender is a python module and not a CLI tool (yet). You may find an example in /examples
from pdbmender import mend_pdb, add_tautomers
mend_pdb(<original_pdb>, <cleaned_pdb>, <input_ff>, <output_ff>)