Our author seems to consistently make the same mistake: there's a distinct lack of articles in the writing. Sprinkle some in, and things start to make sense:
> [A] Linux distribution is [a] well-tested collection of packages
> we would like to have [an] internal mirror of [a] package repository
> some packages are missing in [the] official distribution
> we would like to own [a] package repository, that is to have [a] package repository
> There are many tools to create [a] mirror of [the] Debian package repositories
… and so on. At any rate, this consistency suggests (to me, at least) that he's probably not a native English speaker; in fact, the writer is almost certainly Russian. There's a link to a sponsor, which has a Russian phone number, and if you click around enough, you can find his CV quite easily.
Not everyone on the Internet speaks English, however, enough people do that I could easily see it being beneficial to put your content in English. Who knows?