Information about user who are login

[root@vikas Desktop]# w
13:12:25 up 3:15, 2 users, load average: 0.25, 0.42, 0.30
USER TTY FROM LOGIN@ IDLE JCPU PCPU WHAT
root tty7 :0 10:18 0.00s 5:17 5:17 /usr/bin/X :0 -br -audit 0 -auth /var/gdm/:0.Xauth -nolisten tcp vt7
root pts/1 :0.0 10:18 0.00s 1.58s 0.00s w

[root@vikas Desktop]# who
root tty7 2009-02-07 10:18 (:0)
root pts/1 2009-02-07 10:18 (:0.0)

[root@vikas Desktop]# finger
Login Name Tty Idle Login Time Office Office Phone
root VikasSharma tty7 Feb 7 10:18 (:0)
root VikasSharma pts/1 Feb 7 10:18 (:0.0)
[root@vikas Desktop]#

chfn -- change the finger information
chsh --- to change the shell