Need help in scripting

azheruddin · 12-26-2012, 01:34 AM

Hi All,
Situation Like this.

iam runnning one script for every hour for sometask
iam doing it through date variable

so like this..

if time=12:00 |some task >infile
if time=1:00 |some task >infile
if time=2:00 |some task >infile

so here i want to change time variable automatic for every after an hour and result should append.

now iam running script for every hour manually..
i want to make it auto

sharadchhetri · 12-26-2012, 02:07 AM

Quote:

Originally Posted by azheruddin

Hi All,
Situation Like this.

iam runnning one script for every hour for sometask
iam doing it through date variable

so like this..

if time=12:00 |some task >infile
if time=1:00 |some task >infile
if time=2:00 |some task >infile

so here i want to change time variable automatic for every after an hour and result should append.

now iam running script for every hour manually..
i want to make it auto

try with while true loop
eg.

#!/bin/bash

# This generates a file every 5 minutes

while true; do
touch pic-`date +%s`.jpg
sleep 300
done

for ref. http://tldp.org/LDP/Bash-Beginners-G...ect_09_02.html

markush · 12-26-2012, 03:41 AM

You should use cron, read the manpage for crond. With cron you can make a job done every hour.

As for the time variable, if you want to set a variable to the time you could use for example

Code:

time=$(date +%F_%H)

where %F displays the date and %H is the hour.

Code:

markus@samsung:~$ time=$(date +%F_%H)
markus@samsung:~$ echo $time
2012-12-26_10

Markus

asimba · 12-26-2012, 08:43 AM

Cron ?

shivaa · 12-26-2012, 11:50 AM

If your purpose is only to run your script per hour, then you can add it to crontab as:

Code:

0 */1 * * * /path/to/script

David the H. · 12-26-2012, 04:01 PM

cron is a program (one of several, but the most commonly-used because it's available on almost all systems) that schedules the running of other programs.

Instead of trying to handle the timing inside your script, so that it would have to be always running, make the script do the job only once, but set cron to run it when you need it to.

Here are a couple of useful-looking links I just grabbed off the web:
http://www.cyberciti.biz/faq/how-do-...-or-unix-oses/
http://kvz.io/blog/2007/07/29/schedu...using-crontab/