The article that have spoken about Linux malicious commands that was posted in Ubuntu Forums was restored, but who accessed this link yesterday and this morning saw that this article has been deleted.

[Tom H]

On Fri, Dec 21, 2018 at 5:19 AM Command FreeBSD
<commandfreebsd at gmail.com> wrote:
>
> I am revolted against the injustice of Ubuntu Forums administrators and moderators.

And we don't care that you are.

Any site, run by Ubuntu or not, can have and enforce its own set of rules.