I just installed wb-line-number.el and I find it much nicer than setnu.el.
http://www.anc.ed.ac.uk/~stephen/emacs/ell.html search for wb-line-number.el
  "unni krishnan" <gnu_talk@yahoo.co.in> wrote in message news:mailman.1172.1043921208.21513.help-gnu-emacs@gnu.org...
  hi

      is it possible to display line numbers in emacs (like in vi)?

  i am using an emacs-21.2 on a redhat linux 7.1.



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