[CentOS] CentOS 3 -> logins

Kirk Bocek t004 at kbocek.com
Tue Sep 6 19:52:15 UTC 2005

It took me a bunch of googling and a few dead ends to figure this one out.

You want to edit your /etc/syslog.conf file. Change the line that reads:

*.info;mail.none;authpriv.none;cron.none               /var/log/messages

to read:

*.info;mail.none;authpriv.none;cron.none;auth.!=info            /var/log/messages

Then add:

auth.info                                               /var/log/auth.info

And you probably want to add the new /var/log/auth.info to /etc/logrotate.d as well.

This will move all of the auth messages to a separate file. It looks to me like all 
the messages are coming from the use of a new PAM module. Every time a cron job fires 
there is a round of authentication that gets logged. That's a problem if you've got 
jobs firing every couple of minutes like I do.

Kirk Bocek

Ugo Bellavance wrote:
> Hi,
> 	Since I upgraded CentOS from 3 to 4, I get those enties in logwatch.
> It seems to be caused by cron, opening a session everytime it executes a
> task.  Is that normal?
> crond:
>    Unknown Entries:
>       session closed for user root: 381 Time(s)
>       session opened for user root by (uid=0): 379 Time(s)
>       session closed for user user: 239 Time(s)
>       session opened for user user by (uid=0): 239 Time(s)
>       session closed for user backup_user: 2 Time(s)
>       session opened for user backup_user by (uid=0): 2 Time(s)

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