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This is a tutorial for the Special:RenameUser tool which only stewards and global renamers have access to (although bureaucrats on individual wikis used to perform this task).
DO check the box "Mover as páginas de usuário, páginas de discussão de usuário (e suas subpáginas) para o novo nome" if it should be moved e.g. if you rename a user. If you rename a vandal/impostor the old userpage is most likely vandalism, so delete it before (or afterwards) but don't forget to delete the redirect if you decide to move anything that should not redirect to the new username.
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