Unix Tip: RUN DAILY WITH AT

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UNIX HOT TIP

Unix Tip 3268 - January 20, 2016

http://www.ugu.com/sui/ugu/show?tip.today

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RUN DAILY WITH AT


UNIX provides a command called "at"
which can be used to run jobs according
to the specfied time.

To run a particular job in every hour,
every day use the following set of
commands in a file called "at.sh" which
will be executed recursively everyday.

########### CUT HERE ##################

#! /usr/bin/sh

# dt is a variable used to store
# current date

dt=`date | cut -c5-10`

# tm is a variable used to store
# current time

tm=`date | cut -c12-13`

while [ $tm -le 23 ]
do

# "at" is the command ad -f is the
# option used to execute a specified
# file. "file Name" should be an
# executable file.

at -f ./"file Name" $tm $dt
tm=`expr $tm + 1`
done

# With out manual intervention, automatic
# change over to the next day's job
# scheduling

at -f ./"File Name" 2358 $dt
dt=`expr $dt + 1`
at -f ./at.sh 0002 $dt

########### CUT HERE ##################


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