$ who root pts/1 Aug 25 10:35 (60.28.74.194) magj pts/3 Aug 25 10:26 (60.28.74.194)
2.finger --查看某个用户的登录信息, 以及用户的个人信息.
如:
$ finger magj Login: magj Name: (null) Directory: /home/magj Shell: /bin/bash On since Mon Aug 25 10:26 (CST) on pts/3 from 60.28.74.194 Mail last read Wed Aug 20 09:45 2008 (CST) No Plan.