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How to run a command within a time duration per min/sec?

rated 0 times [ 0] [ 0] / answers: 1 / hits: 818 / 2 Years ago, sun, may 29, 2022, 11:30:37

I want to run a command/shell script say script.sh from 1AM to 2AM per minute. After observing that crontab can't work it out 'per sec' I had to go with 'per min'.

Basically, My server.sh file takes backup of my database on server. This is done by three text files with names of tables in it, hence creating three backup archives. These backup archives are named like 'prefixYYYYmmdd', where prefix = heavy/light/weekly according to the backup type.

Now I want to copy these particular files after they are stored on server. Suppose the backup on server took 15 min. Now I should run the copy script-client.sh on my local computer. As this copy script doesn't know the names of the files just created by server, it should run per sec/min in the interval those files are being created by server and grab that file.

How to use crontab per min/sec within that time interval?

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ightrushi

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answered 2 Years ago ovierman · Accepted Answer

First make a cron job that will start by 1 AM

 1 * * * /path_to_script/script.sh

In script.sh

#!/bin/bash

while true

do

find dir -mtime -1 -exec cp {} directory ;

TEST=`echo $(date +%H)`

if [ $TEST > 2 ]

then

  exit 0

fi



sleep 1

done

Modify the find command to your need ( To find the files modified recently use mtime and use rsync if you want to back from a remote machine or just cp/mv in case it from a local machine)

This script will check for the date and if its beyond 2 AM it will exit automatically.

Hope this helps