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UGU: Unix Guru Universe - Unix Tip #4343- January 31, 2014 - Home : Help : Today's Tip
Unix Tip #4343- January 31, 2014

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 ##################

NOTE: All tips provided are USE AT YOUR OWN RISK. Tips are submitted by various unix admins around the globe. UGU suggest you read and test each tip in a non-volitile environment before placing into production.


LAST 5 TIPS
4342 - FIND THOSE HIDDEN FILES
4341 - RUN ON LAST SUNDAY
4340 - SIMPLE MASK OVERLOOKED
4339 - AUTO WORD COMPLETION
4338 - CHANGE THE SUFFIX


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