 | | | The who command | The who command 2006-06-30 - By Mark McCulligh
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Allen, Jack wrote:
>See below.
>
>-- --Original Message-- --
>From: redhat-install-list-bounces@(protected)
>[mailto:redhat-install-list-bounces@(protected)] On Behalf Of Mark
>McCulligh
>Sent: Thursday, June 29, 2006 3:10 PM
>To: Getting started with Red Hat Linux
>Subject: Re: The who command
>
>Rick Stevens wrote:
>
>
>
>>On Thu, 2006-06-29 at 13:55 -0400, Mark McCulligh wrote:
>>
>>
>>
>>
>>>Rick Stevens wrote:
>>>
>>>
>>>
>>>
>>>
>>>>On Thu, 2006-06-29 at 11:55 -0400, Mark McCulligh wrote:
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>>Hi Group,
>>>>>
>>>>>When I log into my system and run the who command I get no users. If
>>>>>
>>>>>
>I
>
>
>>>>>look at my uptime is says 0 users. Plus if I view the lastlog file
>>>>>
>>>>>
>it
>
>
>>>>>looks like it is corrupt. How I am fix this?
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>"who" is based on what's in /var/log/utmp or /var/log/wtmp. If one
>>>>
>>>>
>of
>
>
>>>>those files is not present, who can't report on users. However,
>>>>/var/log/wtmp is MANDATORY on Linux and is created by init if it does
>>>>not exist.
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>I have tried using the root user. The wtmp file does exist but is
>>>blank. Any ideas?
>>>
>>>
>>>
>>>
>>When you say "blank", what do you mean? Remember that it's a binary
>>file, so "cat" or "vi" are liable to spit out garbage or nothing.
>>
>>Can you post an "ls -l" of it? It should look something like this:
>>
>>[root@(protected) ~]# ls -l /var/log/wtmp
>>-rw-rw-r-- 1 root utmp 364416 Jun 27 15:42 /var/log/wtmp
>>
>>
>>
>>
>This is what I get:
>[root@(protected) log]# lis -l /var/log/wtmp
>-rw-rw-r-- 1 root utmp 0 Jun 1 04:02 /var/log/wtmp
>
>There is also a wtmp.1 file that also size 0.
>
>Mark.
>
>============
>How much free space is there on the file system that has the utmp and
>wtmp files? Some system use to keep the utmp and wtmp file in /etc and
>later they were changed to symbolic links to other locations such as
>/var/log. So some commands may look in the /etc directory and some
>commands may look in /var/log. If the symbolic link has been deleted
>then the data may be in /etc and the who command is looking in /var/log
>for the files.
>
>
>
I have lots of free space around 60GB. I am using RedHat Enterprise ES
4, but don't know if this OS using a symboliclink or not. Is there some
way to reset the wtmp file(like delete it).
Mark.
>Jack Allen
>
>
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