On Tue, 2004-09-07 at 04:19, Matt wrote:
> Ralph Angenendt wrote:
> 
> > Niek wrote:
> > > On 9/7/2004 9:28 AM +0200, Ralph Angenendt wrote:
> > > 
> > > >Which would give the following behaviour how?
> > > >
> > > >| ClamAV update process started at Tue Sep  7 07:08:22 2004
> > > >| ClamAV update process started at Tue Sep  7 08:01:43 2004
> > > >| ClamAV update process started at Tue Sep  7 08:55:03 2004
> > > >
> > > 
> > > something like the following in freshclam.conf:
> > > Checks 25 or 26
> > 
> > As you can see, I'm fully aware of that. "How do you do that with
> > crontab" was the question longing for an answer.
> > 
> > Ralph
> 
> 
>  There was a crontab entry posted a while since, which made use of
> $[RANDOM] to alter the update time. 
>  
>  Relevant section from the original email:
> 
> > As per discussions on this list on awhile ago; I use the following for
> > my crontab entry:
> >  
> > 0 * * * * sleep $[ $RANDOM % 1800 ] ; /usr/local/bin/freshclam --quiet
> >
> > this causes it to sleep for a random period of time not exceeding
> > 30 min before executing.  
> >
> > Rob
> 
> 
> Matt

Slightly better, I think, is to add an offset to avoid hitting close to
the hour. This is what I use:
        sleep $[ 900 + $RANDOM % 1800 ]

which goes from 15 past to 15 to the hour.

        -Bill




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