Couldnt open style file usr/share/ No such file / drectry

I’m Trying to do a tile server setup folowing the below URL :

I have already installed postgresql and also down loaded a country .pbf file.

But when i’m doing :

osm2pgsql --slim -C 1500 --number-processes 4 my_country.osm.pbf

i’m getting the error :

Can any one help me fixing the issue ?