Unfortunately, Andreas' repository doesn't support Maverick. You can get rubyripper from the GetDeb repository (http://www.getdeb.net/updates/Ubuntu/10.10/#how_to_install). From there just do the normal sudo apt-get install rubyripper. It's too bad that the bug mentioned in Sebastian's comment (#22) plagues this version.
Unfortunately, Andreas' repository doesn't support Maverick. You can get rubyripper from the GetDeb repository (http:// www.getdeb. net/updates/ Ubuntu/ 10.10/# how_to_ install). From there just do the normal sudo apt-get install rubyripper. It's too bad that the bug mentioned in Sebastian's comment (#22) plagues this version.