Flagging>Closing>Off-Topic>Migration has these choices:

> belongs on **meta.superuser.com** discussion, support, and feature
> requests for this site
> 
> belongs on **stackoverflow.com** Q&A for professional and enthusiast
> programmers
> 
> belongs on **serverfault.com** Q&A for professional system and network
> administrators
> 
> belongs on **webapps.stackexchange.com** Q&A for power users of web
> applications
> 
> belongs on **android.stackexchange.com** Q&A for enthusiasts and power
> users of the Android operating system

14/48 of the 'Top Questions' list here when I posted this question were UNIX/Linux/Ubuntu related.

If there are more than five slots available, suggest adding 

belongs on **http://unix.stackexchange.com/** Q&A for users and administrators of UNIX and Linux operating systems

belongs on **https://askubuntu.com/** Q&A for users and administrators of Ubuntu operating systems

I know there are many other Stack Exchange sites but those two generate a not insignificant number of questions here and if there are slots available, those communities could better serve those users IMHO, YMMV.