When retagging a question (either with the tag editor or with the question editor), I can't add the tag. This happens both with Chrome and Firefox.

Couldn't save tags because:

  • sorry, the 'linux' tag is not allowed.

sorry, the 'linux' tag is not allowed.

Other tag edits seem to work normally.

If has been added to the blacklist: no! That would be like blacklisting windows on SU.

2 Answers 2


We changed the rules so intrinsic tags are inherently blacklisted across all sites.

(an intrinsic tag is "apple" on apple.se, "wordpress" on wordpress.se, etc etc etc etc. See https://unix.meta.stackexchange.com/a/514/5132 for some more details.)

We can remove "linux" as an intrinsic tag -- "unix" is also intrinsic here -- but this means you will get questions tagged "linux" migrated here without the tag removed.

  • 9
    Yes, please remove linux. Linux is only a subset of the site's topic (a very large subset, but still a subset). It's normal to have it as a tag. Apr 13, 2011 at 11:11
  • 2
    @gilles OK done Apr 13, 2011 at 11:20
  • Agree with Gilles. The example with Apple on apple.se is not the same. Single site, single subject, tag blacklisted :)
    – user66001
    Oct 20, 2013 at 22:33
  • In a site called Tom & Jerry: why Tom should be blacklisted but not Jerry, or vice versa? Should be both or none, IMhO.
    – user232326
    Mar 19, 2020 at 18:07

and were both blacklisted; I'm not sure why (I guess they're probably misused quite a bit, or at least perceived to be). We'll have to wait for a dev to read this I guess

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