A strange who command output Problem

A very strange who command output problem-general Linux technology-Linux technology and application information. The following is a detailed description. [I = s] This post was last edited by wizi

This post was last edited by wizi

Ssh linux1 redhatAS5.5
Displayed after logging on to test1
Last login: Wed Sep 8 13:26:13 2010 from 172.30.172.1
[Root @ test1 ~] #

Who-m results
[Root @ test1 ~] # Who-m
Root pts/0 2010-09-08 13: 26 (172.30.172.1)
[Root @ File ~] #
_______________
Ssh linux2 redhatAS3.0
Displayed after logging on to test2
There is no Last login line
[Root @ test2 ~] #

Who-m results
[Root @ test2 ~] # Who-m
Root pts/0 2010-09-08 (localhost) <-------------- I want to display the IP address,
The logon IP address does not display the same result as the remote ssh Login result with another server.
[Root @ test2 ~] #

I have several shell scripts that use who to get the IP address. It is not normal now. Urgent!
Manually add the Host Name and IP address of the remote computer (netbios) to/etc/hosts
172.30.172.1 myhost
Who-m:
[Root @ test2 ~] # Who-m
Root pts/8 2010-09-08 (myhost)
[Root @ test2 ~] #