interdiff -z pureadmin_0.3-0ubuntu4.diff.gz pureadmin_0.4-0ubuntu1.diff.gz > pureadmin_0.4-0ubuntu1.new_upstream.interdiff
interdiff -z pureadmin_ 0.3-0ubuntu4. diff.gz pureadmin_ 0.4-0ubuntu1. diff.gz > pureadmin_ 0.4-0ubuntu1. new_upstream. interdiff