bsdtar.1 cvvf %2Fnearline%2Fdef-sponsor%2Fuser%2Fmycollection.tar %2Fproject%2Fdef-sponsor%2Fuser%2Fsomething %3E %2Fnearline%2Fdef-sponsor%2Fuser%2Fmycollection.index 
manipulate tape archives
source manpages: bsdtar