how to run a Script automatically Post: 302093316

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Top Forums UNIX for Dummies Questions & Answers how to run a Script automatically Post 302093316 by ravikirankethe on Wednesday 18th of October 2006 04:09:22 PM

10-18-2006

Registered User

Cron Jobs Usage
=================================================

1. Create a Script that you want to run as a CronJob

2. Assign the Script for the CRONTAB
(CRONTAB would be differ from each user. So if you want to create
a tab for the other user log-on as that user)
crontab -e ==> Command to edit the crontab
-e (edit user's crontab)
-l (list user's crontab)
-r (delete user's crontab)

3. Crontab Syntax:
crontab [ -u user ] file

<MIN> <HOUR> <DAY_OF_WEEK> <MONTH> <YEAR> <SCRIPT_NAME>

4. Examples

30 9-17 * 1 sun,wed,sat echo `date` >> /date.file 2>&1
At half past the hour, between 9 AM and 5 PM, for every day of January
which is Sunday, Wednesday or Saturday, append date to file date.file

0 23-7/2,8 * * * date
Every two hours from 11p.m. to 7a.m., and at 8a.m.

0 4 1 jan * date
4:00 a.m. on january 1st

To take the physical database backup every day:
15 23 * * * /home/z755692/scripts/makeDbBackup.sh >> /tmp/DBBACKUP/bkup.log

Reference:
==========
http://www.pantz.org/os/linux/programs/cron.shtml

ravikirankethe

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LEARN ABOUT CENTOS

yum-cron

yum-cron(8)															       yum-cron(8)

NAME

       yum-cron - an interface to convieniently call yum from cron

SYNOPSIS

       yum-cron [config-file]

DESCRIPTION

       yum-cron  is  an  alternate  interface to yum that is optimised to be convenient to call from cron.  It provides methods to keep repository
       metadata up to date, and to check for, download, and apply updates.  Rather than accepting many different command line arguments, the  dif-
       ferent functions of yum-cron can be accessed through config files.

       config-file  is	used  to optionally specify the path to the configuration file to use.	If it is not given, the default configuration file
       will be used.  It is useful to be able to specify different configuration files for different use cases.  For  example,	one  configuration
       file  might  be set to update the repository metadata, and a line could be added to the crontab to run yum-cron frequently using this file.
       Then, another configuration file might be set to install updates, and yum-cron could be run from cron using this file just once each day.

FILES

       /etc/yum/yum-cron.conf
       /etc/yum/yum-cron-hourly.conf

SEE ALSO

       yum (8)

AUTHORS

       See the Authors file included with this program.

BUGS

       There of course aren't any bugs, but if you find any, you should email
	the mailing list, yum@lists.baseurl.org, or consult bugzilla.

Nick Jacek															       yum-cron(8)