Matthew Zhou <zhouyan1986@gmail.com> writes:

> I want to make emacs display the line nubmers in the left margin of
> the screen. Other text editors I am using, textmate, vim, all have
> such features. How to make emacs do this thing?

See http://www.emacswiki.org/cgi-bin/wiki/LineNumbers .

-- 
 |   Michaël `Micha' Cadilhac       |  I cannot reproduce this bug,          |
 |   http://michael.cadilhac.name   |    but I have installed a change       |
 |   JID/MSN:                       |      which I think will fix it.        |
 `----  michael.cadilhac@gmail.com  |          -- Kim F. Storm          -  --'