If you're using the same OpenID for all of them, go here:<br>
[https://serverfault.com/users/67426/user67426?tab=accounts][1]<br>
And it should be an option to link them.

If you did not use the same OpenID then you will have to pick one OpenID and add it to all of your accounts, then see above.


  [1]: https://serverfault.com/users/67426/user67426?tab=accounts