The exact heuristics behind question bans are not known outside of SE. Looking at your profile, you have 3 deleted questions, 4 closed questions and sundry downvotes which is somewhat more negative then you state above.
If you are getting the message:
Sorry, we are no longer accepting questions/answers from this account
There is an automatic filter that will ban questions and/or answers from IP addresses or accounts with a history of extremely poor posts.
The details of the filter are secret, but it is partly based on downvotes. If your questions and/or answers are getting many downvotes, you are likely to be banned.
Deleted questions and deleted answers count towards the automatic ban. If a large percentage of your posts are deleted by yourself or the community, then apparently they were not suitable for the site.
In order to get un-banned, you need to edit some of your existing questions and/or answers to improve them.
Server Fault is for Professional System Administrators (et al) only. You appear to be not a system administrator, and not doing administration is a professional capacity. Your questions involve very basic concepts that would be much more approriate on Super User or Unix and Linux. See our FAQ, and the FAQs from those other sites, for more details.
Question Bans are not due to one single question, and deleting the Question does not remove it from consideration toward the ban. You must improve your existing Question or Answer quality if you want to ask new Questions. For more details see this Post with tons of details