08-28-2009
I am using crontab. The cron runs the script every 15 minutes.
I do not want the email every 15 minutes. I want the script to recognize that it's 6:28, time to send an email if there is one to send.
to use the crontab specifically for the email I'd have to have 2 versions of the script in crontab.
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ATRUN(8) BSD System Manager's Manual ATRUN(8)
NAME
atrun -- run jobs queued for later execution
SYNOPSIS
atrun [-l load_avg] [-d]
DESCRIPTION
atrun runs jobs queued by at(1). Root's crontab(5) must contain the line:
*/10 * * * * root /usr/libexec/atrun
so that atrun(8) gets called every ten minutes.
At every invocation, every job in lowercase queues whose starting time has passed is started. A maximum of one batch job (denoted by upper-
case queues) is started each time atrun is invoked.
OPTIONS
-l load_avg
Specifies a limiting load factor, over which batch jobs should not be run, instead of the compiled-in value of 1.5.
-d Debug; print error messages to standard error instead of using syslog(3).
WARNINGS
For atrun to work, you have to start up a cron(8) daemon.
FILES
/var/at/spool Directory containing output spool files
/var/at/jobs Directory containing job files
SEE ALSO
at(1), crontab(1), syslog(3), crontab(5), cron(8)
AUTHORS
Thomas Koenig <ig25@rz.uni-karlsruhe.de>
BUGS
The functionality of atrun should be merged into cron(8).
BSD
April 12, 1995 BSD