http://34reqsy6tqou6avwrkm23s4mpkrwz3drtq2e5yr7sywi76h7plnaahad.onion/articles/linux.xhtml
Remember, though, that you can easily break shit if you aren't careful - a repo can, for example, pull in a library that a package requires, and that one will replace the one you had before - breaking everything that was dependent on it. There are also other available repositories, such as Ponce or Alien - search around!