You can refer to the following link of our study material in order to know everything related to IUPAC naming of organic compound.
http://www.askiitians.com/iit-jee-chemistry/organic-chemistry/purification-classification-and-nomenclature-of-organic-compounds/general-rules-for-naming-organic-compounds.aspx
Go through it and let us know the specific problem which you face while naming any compound.
Thanks & Regards
Pankaj Singh
askIITians Faculty