What does this mean? 'session opened for user root by (uid=0)'

[Thomas Cameron]

> Hello,
>
> This seems to be a routine log entry I just don't know what causes it.
> On Aug 24th alone I had a total of 479 entries (with corresponding
> 'closed' entries).
>
> The file line is: Aug 25 14:50:02 servername crond(pam_unix)[9219]:
> session closed for user root
>
> I am GUESSING that this is just a message generated everytime some
> kind of cron job is run?
>
> Is this kind of output useful for anything or can it be supressed?
> (Just seems like kind of a waste of disc space.)

You are right - whenever a cron job runs as root it is logged.

I would not deactivate those notices - you might miss something important.

Thomas