It's hard and it has rather old interface (not a bad one, just old). Recently I've switched to patool (http://wummel.github.io/patool/ http://wummel.github.io/

It's hard and it has rather old interface (not a bad one, just old). Recently I've switched to patool (http://wummel.github.io/patool/ http://wummel.github.io/patool/) and quite happy with it.