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 https://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.