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Re: Package automation in /etc/daily
On Jan 17, 2010, at 12:14 PM, Julio Merino wrote:
> On Sun, Jan 17, 2010 at 5:08 PM, Steven Bellovin
> <smb%cs.columbia.edu@localhost> wrote:
>> Maybe the default cron entry should be prefixed with (for ksh)
>> sleep $((RANDOM%30))
>> or some such. (I'm 100% serious about a random delay, though I'd most
>> likely suggest building it in to the fetch command or script, activated by
>> an option used by the cron invocation. If we really wanted to be kinky, we
>> could make the option only active if the program were running without a
>> control tty, i.e., from cron instead of by the administrator. That's worth
>> serious consideration, given how often some people (including me) just
>> cut-and-paste such things from the cron job, since I do it manually seldom
>> enough that the proper flags aren't in my personal cache...
> The new checks I added are at the bottom of the daily script. All the
> checks that run before are slow, including a full scan of the hard
> disk, so they will introduce such 30-second variability anyway.
Cut-and-paste error on my part, from my tests; I intended to indicate a random
delay of up to 3600 seconds.
--Steve Bellovin, http://www.cs.columbia.edu/~smb
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